Document:

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                                                                   EXHIBIT 10.21

                                  INFLOW, INC.
                     1997 STOCK OPTION/STOCK ISSUANCE PLAN
                     -------------------------------------

                                  ARTICLE ONE

                               GENERAL PROVISIONS
                               ------------------

I.  PURPOSE OF THE PLAN

          This 1997 Stock Option/Stock Issuance Plan is intended to promote the
interests of InFlow, Inc., a Delaware corporation, by providing eligible persons
with the opportunity to acquire a proprietary interest, or otherwise increase
their proprietary interest, in the Corporation as an incentive for them to
remain in the service of the Corporation.

          Capitalized terms herein shall have the meanings assigned to such
terms in the attached Appendix.

     II.  STRUCTURE OF THE PLAN

          A.  The Plan shall be divided into two (2) separate equity programs:

               (i) the Option Grant Program under which eligible persons may, at
     the discretion of the Plan Administrator, be granted options to purchase
     shares of Common Stock, and

               (ii) the Stock Issuance Program under which eligible persons may,
     at the discretion of the Plan Administrator, be issued shares of Common
     Stock directly, either through the immediate purchase of such shares or as
     a bonus for services rendered the Corporation (or any Parent or
     Subsidiary).

          B.  The provisions of Articles One and Four shall apply to both equity
programs under the Plan and shall accordingly govern the interests of all
persons under the Plan.

     III.  ADMINISTRATION OF THE PLAN

          A.  The Plan shall be administered by the Board.  However, any or all
administrative functions otherwise exercisable by the Board may be delegated to
the Committee.  Members of the Committee shall serve for such period of time as
the Board may determine and shall be subject to removal by the Board at any
time.  The Board may also at any time terminate the functions of the Committee
and reassume all powers and authority previously delegated to the Committee.

          B.  The Plan Administrator shall have full power and authority
(subject to the provisions of the Plan) to establish such rules and regulations
as it may deem appropriate for proper administration of the Plan and to make
such determinations under, and issue such
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interpretations of, the Plan and any outstanding options or stock issuances
thereunder as it may deem necessary or advisable. Decisions of the Plan
Administrator shall be final and binding on all parties who have an interest in
the Plan or any option or stock issuance thereunder.

     IV.  ELIGIBILITY

          A.  The persons eligible to participate in the Plan are as follows:

                    (i)    Employees,

               (ii) non-employee members of the Board or the non-employee
     members of the board of directors of any Parent or Subsidiary, and

               (iii)       consultants and other independent advisors who
     provide services to the Corporation (or any Parent or Subsidiary).

          B.  The Plan Administrator shall have full authority to determine, (i)
with respect to the option grants under the Option Grant Program, which eligible
persons are to receive option grants, the time or times when such option grants
are to be made, the number of shares to be covered by each such grant, the
status of the granted option as either an Incentive Option or a Non-Statutory
Option, the time or times at which each option is to become exercisable, the
vesting schedule (if any) applicable to the option shares and the maximum term
for which the option is to remain outstanding, and (ii) with respect to stock
issuances under the Stock Issuance Program, which eligible persons are to
receive stock issuances, the time or times when such issuances are to be made,
the number of shares to be issued to each Participant, the vesting schedule (if
any) applicable to the issued shares and the consideration to be paid by the
Participant for such shares.

          C.  The Plan Administrator shall have the absolute discretion either
to grant options in accordance with the Option Grant Program or to effect stock
issuances in accordance with the Stock Issuance Program.

     V.  STOCK SUBJECT TO THE PLAN

          A.  The stock issuable under the Plan shall be shares of authorized
but unissued or reacquired Common Stock.  The maximum number of shares of Common
Stock which may be issued over the term of the Plan shall not exceed 360,000
shares.

          B.  Shares of Common Stock subject to outstanding options shall be
available for subsequent issuance under the Plan to the extent (i) the options
expire or terminate for any reason prior to exercise in full or (ii) the options
are cancelled in accordance with the cancellation-regrant provisions of Article
Two.  Unvested shares issued under the Plan and subsequently repurchased by the
Corporation, at the option exercise price paid per share, pursuant to the
Corporation's repurchase rights under the Plan shall also be available for
reissuance through one or more subsequent option grants under the Plan.

          C.  Should any change be made to the Common Stock by reason of any
stock split, stock dividend, recapitalization, combination of shares, exchange
of shares or other change

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affecting the outstanding Common Stock as a class without the Corporation's
receipt of consideration, appropriate adjustments shall be made to (i) the
maximum number and/or class of securities issuable under the Plan and (ii) the
number and/or class of securities and the exercise price per share in effect
under each outstanding option in order to prevent the dilution or enlargement of
benefits thereunder. The adjustments determined by the Plan Administrator shall
be final, binding and conclusive. In no event shall any such adjustments be made
in connection with the conversion of one or more outstanding shares of the
Corporation's preferred stock into shares of Common Stock.

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                                  ARTICLE TWO

                              OPTION GRANT PROGRAM
                              --------------------

     I.  OPTION TERMS

          Each option shall be evidenced by one or more documents in the form
approved by the Plan Administrator; provided, however, that each such document
                                    --------
shall comply with the terms specified below.  Each document evidencing an
Incentive Option shall, in addition, be subject to the provisions of the Plan
applicable to such options.

          A.  Exercise Price.
              --------------

          1.  The exercise price per share shall be fixed by the Plan
Administrator and may be equal to, less than or greater than the Fair Market
Value per share of Common Stock on the option grant date.

          2.  The exercise price shall become immediately due upon exercise of
the option and shall, subject to the provisions of Section I of Article Four and
the documents evidencing the option, be payable in cash or check made payable to
the Corporation.  Should the Common Stock be registered under Section 12(g) of
the 1934 Act at the time the option is exercised, then the exercise price may
also be paid as follows:

               (i) in shares of Common Stock held for the requisite period
     necessary to avoid a charge to the Corporation's earnings for financial
     reporting purposes and valued at Fair Market Value on the Exercise Date, or

               (ii) to the extent the option is exercised for vested shares,
     through a special sale and remittance procedure pursuant to which the
     Optionee shall concurrently provide irrevocable written instructions (A) to
     a Corporation-designated brokerage firm to effect the immediate sale of the
     purchased shares and remit to the Corporation, out of the sale proceeds
     available on the settlement date, sufficient funds to cover the aggregate
     exercise price payable for the purchased shares plus all applicable
     Federal, state and local income and employment taxes required to be
     withheld by the Corporation by reason of such exercise and (B) to the
     Corporation to deliver the certificates for the purchased shares directly
     to such brokerage firm in order to complete the sale.

          Except to the extent such sale and remittance procedure is utilized,
payment of the exercise price for the purchased shares must be made on the
Exercise Date.

          B.  Exercise and Term of Options.  Each option shall be exercisable at
              ----------------------------
such time or times, during such period and for such number of shares as shall be
determined by the Plan Administrator and set forth in the documents evidencing
the option.  However, no option shall have a term in excess of ten (10) years
measured from the option grant date.

          C.  Effect of Termination of Service.
              --------------------------------

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          1.  The following provisions shall govern the exercise of any options
held by the Optionee at the time of cessation of Service or death:

               (i)   Any option outstanding at the time of the Optionee's
     cessation of Service for any reason other than Disability or death shall
     remain exercisable for such period of time thereafter as shall be
     determined by the Plan Administrator and set forth in the documents
     evidencing the option, but no such option shall be exercisable after the
     expiration of the option term.

               (ii)  Should Optionee's Service terminate by reason of
     Disability, then the Optionee shall have a period of six (6) months
     following the date of such cessation of Service during which to exercise
     each outstanding option held by such Optionee. However, should such
     Disability be deemed to constitute Permanent Disability, then the period
     during which each outstanding option held by the Optionee is to remain
     exercisable shall be extended by an additional six (6) months so that the
     exercise period shall be the twelve (12)-month period following the date of
     the Optionee's cessation of Service by reason of such Permanent Disability.

               (iii) Should the Optionee die while holding one or more
     outstanding options, then the personal representative of the Optionee's
     estate or the person or persons to whom the option is transferred pursuant
     to the Optionee's will or in accordance with the laws of descent and
     distribution shall have a period of twelve (12) months following the date
     of the Optionee's death during which to exercise each such option.

               (iv)  During the applicable post-Service exercise period, the
     option may not be exercised in the aggregate for more than the number of
     vested shares for which the option is exercisable on the date of the
     Optionee's cessation of Service.  Upon the expiration of the applicable
     exercise period or (if earlier) upon the expiration of the option term, the
     option shall terminate and cease to be outstanding for any vested shares
     for which the option has not been exercised.  However, the option shall,
     immediately upon the Optionee's cessation of Service, terminate and cease
     to be outstanding to the extent the option is not otherwise at that time
     exercisable for vested shares.

               (v)   In the event of an Involuntary Termination following a
     Corporate Transaction, the provisions of Section III of this Article Two
     shall govern the period for which the outstanding options are to remain
     exercisable following the Optionee's cessation of Service and shall
     supersede any provisions to the contrary in this section.

          2.  The Plan Administrator shall have the discretion, exercisable
either at the time an option is granted or at any time while the option remains
outstanding, to:

               (i) extend the period of time for which the option is to remain
     exercisable following Optionee's cessation of Service or death from the

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     limited period otherwise in effect for that option to such greater period
     of time as the Plan Administrator shall deem appropriate, but in no event
     beyond the expiration of the option term, and/or

               (ii) permit the option to be exercised, during the applicable
     post-Service exercise period, not only with respect to the number of vested
     shares of Common Stock for which such option is exercisable at the time of
     the Optionee's cessation of Service but also with respect to one or more
     additional installments in which the Optionee would have vested under the
     option had the Optionee continued in Service.

          D.  Stockholder Rights.  The holder of an option shall have no
              ------------------
stockholder rights with respect to the shares subject to the option until such
person shall have exercised the option, paid the exercise price and become a
holder of record of the purchased shares.

          E.   Unvested Shares.  The Plan Administrator shall have the
               ---------------
discretion to grant options which are exercisable for unvested shares of Common
Stock.  Should the Optionee cease Service while holding such unvested shares,
the Corporation shall have the right to repurchase, at the exercise price paid
per share, all or (at the discretion of the Corporation and with the consent of
the Optionee) any of those unvested shares.  The terms upon which such
repurchase right shall be exercisable (including the period and procedure for
exercise and the appropriate vesting schedule for the purchased shares) shall be
established by the Plan Administrator and set forth in the document evidencing
such repurchase right.

          F.  First Refusal Rights.  Until such time as the Common Stock is
              --------------------
first registered under Section 12(g) of the 1934 Act, the Corporation shall have
the right of first refusal with respect to any proposed disposition by the
Optionee (or any successor in interest) of any shares of Common Stock issued
under the Plan.  Such right of first refusal shall be exercisable in accordance
with the terms established by the Plan Administrator and set forth in the
document evidencing such right.

          G.  Limited Transferability of Options.  During the lifetime of the
              ----------------------------------
Optionee, the option shall be exercisable only by the Optionee and shall not be
assignable or transferable other than by will or by the laws of descent and
distribution following the Optionee's death.

          H.  Withholding.  The Corporation's obligation to deliver shares of
              -----------
Common Stock upon the exercise of any options granted under the Plan shall be
subject to the satisfaction of all applicable Federal, state and local income
and employment tax withholding requirements.

     II.  INCENTIVE OPTIONS

          The terms specified below shall be applicable to all Incentive
Options.  Except as modified by the provisions of this Section II, all the
provisions of the Plan shall be applicable to Incentive Options.  Options which
are specifically designated as Non-Statutory Options shall not be subject to the
                                                           ---
terms of this Section II.

          A.  Eligibility.  Incentive Options may only be granted to Employees.
              -----------

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          B.  Exercise Price.  The exercise price per share shall not be less
              --------------
than one hundred percent (100%) of the Fair Market Value per share of Common
Stock on the option grant date.

          C.  Dollar Limitation.  The aggregate Fair Market Value of the shares
              -----------------
of Common Stock (determined as of the respective date or dates of grant) for
which one or more options granted to any Employee under the Plan (or any other
option plan of the Corporation or any Parent or Subsidiary) may for the first
time become exercisable as Incentive Options during any one (1) calendar year
shall not exceed the sum of One Hundred Thousand Dollars ($100,000).  To the
extent the Employee holds two (2) or more such options which become exercisable
for the first time in the same calendar year, the foregoing limitation on the
exercisability of such options as Incentive Options shall be applied on the
basis of the order in which such options are granted.

          D.  10% Stockholder.  If any Employee to whom an Incentive Option is
              ---------------
granted is a 10% Stockholder, then the exercise price per share shall not be
less than one hundred ten percent (110%) of the Fair Market Value per share of
Common Stock on the option grant date and the option term shall not exceed five
(5) years measured from the option grant date.

     III.  CORPORATE TRANSACTION

          A.  In the event of any Corporate Transaction, each outstanding option
shall be (i) assumed by the successor corporation (or parent thereof) or (ii)
replaced with a comparable option to purchase shares of the capital stock of the
successor corporation (or parent thereof) or with a cash incentive program of
the successor corporation which preserves the spread existing on the unvested
option shares at the time of the Corporate Transaction and provides for
subsequent payout in accordance with the same vesting schedule applicable to
such option.  The determination of option comparability under clause (ii) above
shall be made by the Plan Administrator, and its determination shall be final,
binding and conclusive.  However, to the extent the successor corporation (or
parent thereof) does not effect such assumption or replacement, each outstanding
option shall automatically accelerate so that each such option shall,
immediately prior to the effective date of the Corporate Transaction, become
fully exercisable for all of the shares of Common Stock at the time subject to
such option and may be exercised for any or all of those shares as fully-vested
shares of Common Stock.

          B.  All outstanding repurchase rights shall also be assigned to the
successor corporation (or parent thereof) in the event of any Corporate
Transaction.  However, to the extent the successor corporation (or parent
thereof) does not accept such assignment, the outstanding repurchase rights
shall terminate automatically, and the shares of Common Stock subject to those
terminated rights shall immediately vest in full, upon the consummation of the
Corporate Transaction, except to the extent such accelerated vesting is
precluded by other limitations imposed by the Plan Administrator at the time the
repurchase right is issued.

          C.  Unless otherwise provided by the Plan Administrator, immediately
following the consummation of the Corporate Transaction, all outstanding options
shall terminate and cease to be outstanding, except to the extent assumed by the
successor corporation (or parent thereof).

<PAGE>

          D.  Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction, had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments shall also be made to (i) the number and class of
securities available for issuance under the Plan following the consummation of
such Corporate Transaction and (ii) the exercise price payable per share under
each outstanding option, provided the aggregate exercise price payable for such
                         --------
securities shall remain the same.

          E.  The Plan Administrator shall have the discretion, exercisable
either at the time the option is granted or at any time while the option remains
outstanding, to provide for the automatic acceleration, in whole or in part, of
one or more outstanding options (and the automatic termination, in whole or in
part, of one or more outstanding repurchase rights, with the immediate vesting
of the shares of Common Stock subject to those terminated rights) upon the
occurrence of a Corporate Transaction, whether or not those options are to be
assumed or replaced (or those repurchase rights are to be assigned) in the
Corporate Transaction.

          F.  The Plan Administrator shall also have full power and authority to
grant options under the Plan which will automatically accelerate in whole or in
part should the Optionee's Service subsequently terminate by reason of an
Involuntary Termination within a designated period (not to exceed twelve (12)
months) following the effective date of any Corporate Transaction in which those
options are assumed or replaced and do not otherwise accelerate.  Any options so
accelerated shall remain exercisable for fully-vested shares until the earlier
                                                                       -------
of (i) the expiration of the option term or (ii) the expiration of the one (1)-
year period measured from the effective date of the Involuntary Termination.  In
addition, the Plan Administrator may provide that one or more of the
Corporation's outstanding repurchase rights with respect to shares held by the
Optionee at the time of such Involuntary Termination shall immediately terminate
in whole or in part, and the shares subject to those terminated rights shall
accordingly vest.

          G.  The portion of any Incentive Option accelerated in connection with
a Corporate Transaction shall remain exercisable as an Incentive Option only to
the extent the applicable One Hundred Thousand Dollar limitation is not
exceeded.  To the extent such dollar limitation is exceeded, the accelerated
portion of such option shall be exercisable as a Non-Statutory Option under the
Federal tax laws.

          H.  The grant of options under the Plan shall in no way affect the
right of the Corporation to adjust, reclassify, reorganize or otherwise change
its capital or business structure or to merge, consolidate, dissolve, liquidate
or sell or transfer all or any part of its business or assets.

     IV.  CANCELLATION AND REGRANT OF OPTIONS

          The Plan Administrator shall have the authority to effect, at any time
and from time to time, with the consent of the affected option holders, the
cancellation of any or all outstanding options under the Plan and to grant in
substitution therefor new options covering the

<PAGE>

same or different number of shares of Common Stock but with an exercise price
per share based on the Fair Market Value per share of Common Stock on the new
option grant date.

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                                 ARTICLE THREE

                             STOCK ISSUANCE PROGRAM
                             ----------------------

     I.   STOCK ISSUANCE TERMS

          Shares of Common Stock may be issued under the Stock Issuance Program
through direct and immediate issuances without any intervening option grants.
Each such stock issuance shall be evidenced by a Stock Issuance Agreement which
complies with the terms specified below.

          A.  Purchase Price.
              --------------

          1.  The purchase price per share shall be fixed by the Plan
Administrator and may be less than the Fair Market Value of the Common Stock on
the stock issuance date.

          2.  Subject to the provisions of Section I of Article Four, shares of
Common Stock may be issued under the Stock Issuance Program for one or both of
the following items of consideration which the Plan Administrator may deem
appropriate in each individual instance:

              (i)   cash or check made payable to the Corporation, or

              (ii)  past services rendered to the Corporation (or any Parent or
     Subsidiary).

          B.  Vesting Provisions.
              ------------------

          1.  Shares of Common Stock issued under the Stock Issuance Program
may, in the discretion of the Plan Administrator, be fully and immediately
vested upon issuance or may vest in one or more installments over the
Participant's period of Service or upon attainment of specified performance
objectives.  The elements of the vesting schedule applicable to any unvested
shares of Common Stock issued under the Stock Issuance Program, namely:

              (i)   the Service period to be completed by the Participant or the
     performance objectives to be attained,

              (ii)  the number of installments in which the shares are to vest,

              (iii) the interval or intervals (if any) which are to lapse
     between installments, and

               (iv) the effect which death, Disability or other event designated
     by the Plan Administrator is to have upon the vesting schedule,

<PAGE>

shall be determined by the Plan Administrator and incorporated into the Stock
Issuance Agreement.

          2.  Any new, substituted or additional securities or other property
(including money paid other than as a regular cash dividend) which the
Participant may have the right to receive with respect to the Participant's
unvested shares of Common Stock by reason of any stock dividend, stock split,
recapitalization, combination of shares, exchange of shares or other change
affecting the outstanding Common Stock as a class without the Corporation's
receipt of consideration shall be issued subject to (i) the same vesting
requirements applicable to the Participant's unvested shares of Common Stock and
(ii) such escrow arrangements as the Plan Administrator shall deem appropriate.

          3.  The Participant shall have full stockholder rights with respect to
any shares of Common Stock issued to the Participant under the Stock Issuance
Program, whether or not the Participant's interest in those shares is vested.
Accordingly, the Participant shall have the right to vote such shares and to
receive any regular cash dividends paid on such shares.

          4.  Should the Participant cease to remain in Service while holding
one or more unvested shares of Common Stock issued under the Stock Issuance
Program or should the performance objectives not be attained with respect to one
or more such unvested shares of Common Stock, then those shares shall be
immediately surrendered to the Corporation for cancellation, and the Participant
shall have no further stockholder rights with respect to those shares.  To the
extent the surrendered shares were previously issued to the Participant for
consideration paid in cash or cash equivalent (including the Participant's
purchase-money indebtedness), the Corporation shall repay to the Participant the
cash consideration paid for the surrendered shares and shall cancel the unpaid
principal balance of any outstanding purchase-money note of the Participant
attributable to such surrendered shares.

          5.  The Plan Administrator may in its discretion waive the surrender
and cancellation of one or more unvested shares of Common Stock (or other assets
attributable thereto) which would otherwise occur upon the non-completion of the
vesting schedule applicable to such shares.  Such waiver shall result in the
immediate vesting of the Participant's interest in the shares of Common Stock as
to which the waiver applies.  Such waiver may be effected at any time, whether
before or after the Participant's cessation of Service or the attainment or non-
attainment of the applicable performance objectives.

          C.  First Refusal Rights.  Until such time as the Common Stock is
              --------------------
first registered under Section 12(g) of the 1934 Act, the Corporation shall have
the right of first refusal with respect to any proposed disposition by the
Participant (or any successor in interest) of any shares of Common Stock issued
under the Stock Issuance Program.  Such right of first refusal shall be
exercisable in accordance with the terms established by the Plan Administrator
and set forth in the document evidencing such right.

     II.  CORPORATE TRANSACTION

<PAGE>

          A.  All of the outstanding repurchase rights under the Stock Issuance
Program shall be assigned to the successor corporation (or parent thereof) in
any Corporate Transaction.  However, to the extent such successor corporation
(or parent thereof) does not accept such assignment, the repurchase rights shall
automatically terminate and the shares shall vest in full unless such
accelerated vesting is precluded by other limitations imposed in the Stock
Issuance Agreement.

          B.  The Plan Administrator shall have the discretionary authority,
exercisable either at the time the unvested shares are issued or any time while
the Corporation's repurchase/cancellation rights remain outstanding under the
Stock Issuance Program, to provide that those rights shall automatically
terminate in whole or in part, and the shares of Common Stock subject to those
terminated rights shall immediately vest, in the event the Participant's Service
should subsequently terminate by reason of an Involuntary Termination within a
designated period (not to exceed twelve (12) months) following the effective
date of any Corporate Transaction in which those repurchase/cancellation rights
are assigned to the successor corporation (or parent thereof).

     III.  SHARE ESCROW/LEGENDS

          Unvested shares may, in the Plan Administrator's discretion, be held
in escrow by the Corporation until the Participant's interest in such shares
vests or may be issued directly to the Participant with restrictive legends on
the certificates evidencing those unvested shares.

<PAGE>

                                  ARTICLE FOUR

                                 MISCELLANEOUS
                                 -------------

     I.  FINANCING

          The Plan Administrator may permit any Optionee or Participant to pay
the option exercise price or the purchase price for shares issued to such person
under the Plan by delivering a promissory note payable in one or more
installments.  The terms of any such promissory note (including the interest
rate and the terms of repayment) shall be established by the Plan Administrator
in its sole discretion.  Promissory notes may be authorized with or without
security or collateral.  In all events, the maximum credit available to the
Optionee or Participant may not exceed the sum of (i) the aggregate option
                                           ---
exercise price or purchase price payable for the purchased shares (less the par
value of such shares) plus (ii) any Federal, state and local income and
employment tax liability incurred by the Optionee or the Participant in
connection with the option exercise or share purchase.

     II.  EFFECTIVE DATE AND TERM OF PLAN

          A.  The Plan shall become effective when adopted by the Board, but no
option granted under the Plan may be exercised, and no shares shall be issued
under the Plan, until the Plan is approved by the Corporation's stockholders.
If such stockholder approval is not obtained within twelve (12) months after the
date of the Board's adoption of the Plan, then all options previously granted
under the Plan shall terminate and cease to be outstanding, and no further
options shall be granted and no shares shall be issued under the Plan.  Subject
to such limitation, the Plan Administrator may grant options and issue shares
under the Plan at any time after the effective date of the Plan and before the
date fixed herein for termination of the Plan.

          B.  The Plan shall terminate upon the earliest of (i) the expiration
                                                --------
of the ten (10)-year period measured from the date the Plan is adopted by the
Board, (ii) the date on which all shares available for issuance under the Plan
shall have been issued or (iii) the termination of all outstanding options in
connection with a Corporate Transaction.  Upon such Plan termination, all
options and unvested stock issuances outstanding under the Plan shall continue
to have full force and effect in accordance with the provisions of the documents
evidencing such options or issuances.

     III.  AMENDMENT OF THE PLAN

          A.  The Board shall have complete and exclusive power and authority to
amend or modify the Plan in any or all respects.  However, no such amendment or
modification shall adversely affect the rights and obligations with respect to
options or unvested stock issuances at the time outstanding under the Plan
unless the Optionee or the Participant consents to such amendment or
modification.

          B.  Options to purchase shares of Common Stock may be granted under
the Plan and shares of Common Stock may be issued under the Plan that are in
each instance in excess of the number of shares then available for issuance
under the Plan, provided any excess

<PAGE>

shares actually issued under the Plan are held in escrow until there is obtained
stockholder approval of an amendment sufficiently increasing the number of
shares of Common Stock available for issuance under the Plan. If such
stockholder approval is not obtained within twelve (12) months after the date
the first such excess issuances are made, then (i) any unexercised options
granted on the basis of such excess shares shall terminate and cease to be
outstanding and (ii) the Corporation shall promptly refund to the Optionees and
the Participants the exercise or purchase price paid for any excess shares
issued under the Plan and held in escrow, together with interest (at the
applicable Short-Term Federal Rate) for the period the shares were held in
escrow, and such shares shall thereupon be automatically cancelled and cease to
be outstanding.

     IV.  USE OF PROCEEDS

          Any cash proceeds received by the Corporation from the sale of shares
of Common Stock under the Plan shall be used for general corporate purposes.

     V.  WITHHOLDING

          The Corporation's obligation to deliver shares of Common Stock upon
the exercise of any options or upon the issuance or vesting of any shares issued
under the Plan shall be subject to the satisfaction of all applicable Federal,
state and local income and employment tax withholding requirements.

     VI.  REGULATORY APPROVALS

          The implementation of the Plan, the granting of any options under the
Plan and the issuance of any shares of Common Stock (i) upon the exercise of any
option or (ii) under the Stock Issuance Program shall be subject to the
Corporation's procurement of all approvals and permits required by regulatory
authorities having jurisdiction over the Plan, the options granted under it and
the shares of Common Stock issued pursuant to it.

     VII. NO EMPLOYMENT OR SERVICE RIGHTS

          Nothing in the Plan shall confer upon the Optionee or the Participant
any right to continue in Service for any period of specific duration or
interfere with or otherwise restrict in any way the rights of the Corporation
(or any Parent or Subsidiary employing or retaining such person) or of the
Optionee or the Participant, which rights are hereby expressly reserved by each,
to terminate such person's Service at any time for any reason, with or without
cause.

<PAGE>

                                    APPENDIX
                                    --------

          The following definitions shall be in effect under the Plan:

          A.  Board shall mean the Corporation's Board of Directors.
              -----

          B.  Code shall mean the Internal Revenue Code of 1986, as amended.
              ----

          C.  Committee shall mean a committee of two (2) or more Board members
              ---------
appointed by the Board to exercise one or more administrative functions under
the Plan.

          D.  Common Stock shall mean the Corporation's common stock.
              ------------

          E.  Corporate Transaction shall mean any of the following
              ---------------------
transactions:

              (i)   a merger or consolidation in which securities possessing
     more than fifty percent (50%) of the total combined voting power of the
     Corporation's outstanding securities are transferred to a person or persons
     different from the persons holding those securities immediately prior to
     such transaction,

              (ii)  the sale, transfer or other disposition of all or
     substantially all of the Corporation's assets or capital stock, or

              (iii) a tender or exchange offer in which, after the
     consummation of the offer, the offeror is the beneficial owner (as
     determined pursuant to Section 13(d) of the Securities Exchange Act of
     1934, as amended), directly or indirectly, of at least 15 percent of the
     outstanding Common Stock.

          F.  Corporation shall mean InFlow, Inc., a Delaware corporation.
              -----------

          G.  Disability shall mean the inability of the Optionee or the
              ----------
Participant to engage in any substantial gainful activity by reason of any
medically determinable physical or mental impairment and shall be determined by
the Plan Administrator on the basis of such medical evidence as the Plan
Administrator deems warranted under the circumstances.  Disability shall be
deemed to constitute Permanent Disability in the event that such Disability is
expected to result in death or has lasted or can be expected to last for a
continuous period of twelve (12) months or more.

          H.  Employee shall mean an individual who is in the employ of the
              --------
Corporation (or any Parent or Subsidiary), subject to the control and direction
of the employer entity as to both the work to be performed and the manner and
method of performance.

          I.  Exercise Date shall mean the date on which the Corporation shall
              -------------
have received written notice of the option exercise.

<PAGE>

          J.  Fair Market Value per share of Common Stock on any relevant date
              -----------------
shall be determined in accordance with the following provisions:

              (i)   If the Common Stock is at the time traded on the Nasdaq
     National Market, then the Fair Market Value shall be the closing selling
     price per share of Common Stock on the date in question, as such price is
     reported by the National Association of Securities Dealers on the Nasdaq
     National Market or any successor system. If there is no closing selling
     price for the Common Stock on the date in question, then the Fair Market
     Value shall be the closing selling price on the last preceding date for
     which such quotation exists.

              (ii)  If the Common Stock is at the time listed on any Stock
     Exchange, then the Fair Market Value shall be the closing selling price per
     share of Common Stock on the date in question on the Stock Exchange
     determined by the Plan Administrator to be the primary market for the
     Common Stock, as such price is officially quoted in the composite tape of
     transactions on such exchange. If there is no closing selling price for the
     Common Stock on the date in question, then the Fair Market Value shall be
     the closing selling price on the last preceding date for which such
     quotation exists.

              (iii) If the Common Stock is at the time neither listed on
     any Stock Exchange nor traded on the Nasdaq National Market, then the Fair
     Market Value shall be determined by the Plan Administrator after taking
     into account such factors as the Plan Administrator shall deem appropriate.

          K.  Incentive Option shall mean an option which satisfies the
              ----------------
requirements of Code Section 422.

          L.  Involuntary Termination shall mean the termination of the Service
              -----------------------
of any individual which occurs by reason of:

              (i)   such individual's involuntary dismissal or discharge by the
     Corporation for reasons other than Misconduct, or

              (ii)  such individual's voluntary resignation following (A) a
     change in his or her position with the Corporation which materially reduces
     his or her level of responsibility, (B) a reduction in his or her level of
     compensation (including base salary, fringe benefits and participation in
     corporate-performance based bonus or incentive programs) by more than
     fifteen percent (15%) or (C) a relocation of such individual's place of
     employment by more than fifty (50) miles, provided and only if such change,
     reduction or relocation is effected without the individual's consent.

          M.  Misconduct shall mean the commission of any act of fraud,
              ----------
embezzlement or dishonesty by the Optionee or Participant, any unauthorized use
or disclosure by such person of confidential information or trade secrets of the
Corporation (or any Parent or Subsidiary), or any other intentional misconduct
by such person adversely affecting the business or affairs of the Corporation
(or any Parent or Subsidiary) in a material manner.  The foregoing

<PAGE>

definition shall not be deemed to be inclusive of all the acts or omissions
which the Corporation (or any Parent or Subsidiary) may consider as grounds for
the dismissal or discharge of any Optionee, Participant or other person in the
Service of the Corporation (or any Parent or Subsidiary).

          N.  1934 Act shall mean the Securities Exchange Act of 1934, as
              --------
amended.

          O.  Non-Statutory Option shall mean an option not intended to satisfy
              --------------------
the requirements of Code Section 422.

          P.  Option Grant Program shall mean the option grant program in effect
              --------------------
under the Plan.

          Q.  Optionee shall mean any person to whom an option is granted under
              --------
the Plan.

          R.  Parent shall mean any corporation (other than the Corporation) in
              ------
an unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

          S.  Participant shall mean any person who is issued shares of Common
              -----------
Stock under the Stock Issuance Program.

          T.  Plan shall mean the Corporation's 1997 Stock Option/Stock Issuance
              ----
Plan, as set forth in this document.

          U.  Plan Administrator shall mean either the Board or the Committee,
              ------------------
to the extent the Committee is at the time responsible for the administration of
the Plan.

          V.  Service shall mean the provision of services to the Corporation
              -------
(or any Parent or Subsidiary) by a person in the capacity of an Employee, a non-
employee member of the board of directors or a consultant or independent
advisor, except to the extent otherwise specifically provided in the documents
evidencing the option grant.

          W.  Stock Exchange shall mean either the American Stock Exchange or
              --------------
the New York Stock Exchange.

          X.  Stock Issuance Agreement shall mean the agreement entered into by
              ------------------------
the Corporation and the Participant at the time of issuance of shares of Common
Stock under the Stock Issuance Program.

          Y.  Stock Issuance Program shall mean the stock issuance program in
              ----------------------
effect under the Plan.

          Z.  Subsidiary shall mean any corporation (other than the Corporation)
              ----------
in an unbroken chain of corporations beginning with the Corporation, provided
each corporation (other

<PAGE>

than the last corporation) in the unbroken chain owns, at the time of the
determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

          AA.  10% Stockholder shall mean the owner of stock (as determined
               ---------------
under Code Section 424(d)) possessing more than ten percent (10%) of the total
combined voting power of all classes of stock of the Corporation (or any Parent
or Subsidiary).<PAGE>

                                                                    EXHIBIT 10.3

                             VSTREAM INCORPORATED

                             AMENDED AND RESTATED
                            STOCKHOLDERS' AGREEMENT

                               November 17, 1999
<PAGE>

                               TABLE OF CONTENTS

                                                                           Page
                                                                           ----
Article I Certain Definitions...............................................  1

Article II Registration Rights..............................................  4
     2.1  Demand Registrations..............................................  4
     2.2  Piggyback Registrations...........................................  6
     2.3  Expenses of Registration..........................................  7
     2.4  Registration Procedures...........................................  7
     2.5  Indemnification...................................................  9
     2.6  Other Obligations................................................. 11
     2.7  Termination of Registration Rights................................ 12

Article III Restrictions On Transfer Of Management Stock.................... 12
     3.1  Rights of First Refusal........................................... 12
     3.2  Participation Rights.............................................. 14
     3.3  Exempt Transactions............................................... 14
     3.4  Assignment of First Refusal Right................................. 14

Article IV Right of First Notification...................................... 15

Article V Covenants Of The Company.......................................... 16
     5.1  Basic Financial Information....................................... 16
     5.2  Additional Information Rights..................................... 17
     5.3  Prompt Payment of Taxes, Etc...................................... 18
     5.4  Maintenance of Properties and Leases.............................. 18
     5.5  Insurance......................................................... 18
     5.6  Accounts and Records.............................................. 19
     5.7  Independent Accountants........................................... 19
     5.8  Compliance with Laws.............................................. 20
     5.9  Maintenance of Corporate Existence, Etc........................... 19
     5.10 Limited First Refusal Rights...................................... 20

Article VI Corporate Governance............................................. 21
     6.1  Board of Directors................................................ 21
     6.2  Meetings of the Board............................................. 23
     6.3  Committees........................................................ 24
     6.4  Reimbursement of Expenses......................................... 24
     6.5  Certain Approvals................................................. 24

Article VII Miscellaneous................................................... 24
     7.1  Governing Law..................................................... 24
     7.2  "Market Stand-Off" Agreement...................................... 24
     7.3  Successors and Assigns............................................ 25
     7.4  Entire Agreement: Amendment and Waiver............................ 26

                                       i
<PAGE>

     6.5  Notices, Etc...................................................... 25
     6.6  Delays or Omissions............................................... 26
     6.7  Severability...................................................... 26
     6.8  Counterparts...................................................... 26
     6.9  Termination....................................................... 26
     6.10 Specific Enforcement.............................................. 26

                                      ii
<PAGE>

                 AMENDED AND RESTATED STOCKHOLDERS' AGREEMENT

     Amended and Restated Stockholders Agreement (this "Agreement") dated as of
November 17, 1999  by and among (i) VStream Incorporated, a Delaware corporation
(the "Company"), (ii) the holders of the Company's Series B Preferred Stock,
Series C Preferred Stock and Series D Preferred Stock identified on the
signature pages hereto (the "Investors"), and (iii) the members of the Company's
management identified on the signature pages hereto or that have otherwise
agreed to be bound by the provisions hereof (the "Management Holders").  The
Investors and the Management Holders are referred to collectively as the
"Stockholders."

     The purchasers of Series D Preferred Stock (the "Purchasers") and the
Company are parties to a Series D Preferred Stock Purchase Agreement of even
date herewith (the "Purchase Agreement").  The Purchasers' obligations under the
Purchase Agreement are conditioned upon the execution and delivery of this
Agreement by the Stockholders and the Company.

     Now, Therefore, in consideration of the mutual promises and covenants set
forth herein, the parties agree as follows:

                                   Article I

                              Certain Definitions

     As used in this Agreement, the following terms shall have the following
respective meanings:

     1.1   "Affiliate" shall mean any individual, partnership, corporation,
association, joint stock company, trust, joint venture, unincorporated
organization, governmental entity or any department, agency or political
subdivision thereof, controlling, controlled by or under common control with the
referenced party and any partner of an Investor which is a partnership and any
member of an Investor which is a limited liability company.

     1.2   "Certificate of Amendment" shall mean the Company's Certificate of
Amendment to its Certificate of Incorporation setting forth the rights,
preferences, privileges and restrictions of the Series A Preferred Stock, Series
B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock.

     1.3   "Closing" shall mean the date of the initial sale of shares of the
Company's Series D Preferred Stock pursuant to the Purchase Agreement.

     1.4   "Commission" shall mean the Securities and Exchange Commission or any
other federal agency at the time administering the Securities Act.

     1.5   "Common Stock" shall mean the Company's Common Stock, $.001 par value
per share.

<PAGE>

     1.6   "Exchange Act" shall mean the Securities Exchange Act of 1934 (or any
similar successor federal statute), as amended, and the rules and regulations
thereunder, all as the same shall be in effect from time to time.

     1.7   "Independent Third Party" means any person who, immediately prior to
the contemplated transaction, does not own in excess of 5 percent (5%) of the
Company's Common Stock, on a fully-diluted basis (a "5% Owner"), who is not
controlling, controlled by or under common control with any such 5% Owner and
who is not the spouse or descendent (by birth or adoption) of any such 5% Owner
or a trust for the benefit of such 5% Owner and/or such other persons.

     1.8   "Initiating Holders"  shall mean holders of Registrable Securities
representing not less than thirty-three percent (33%) of the then-outstanding
Registrable Securities.

     1.9   "Investor Stock" shall mean (i) shares of Common Stock owned by the
Investors or any transferee thereof; (ii) shares of Common Stock issued or
issuable upon the conversion or exercise of any stock (including, without
limitation, the Series B Preferred Stock, Series C Preferred Stock and Series D
Preferred Stock) warrants, options or other securities of the Company owned by
the Investors or any transferee thereof; and (iii) any shares of Common Stock
issued as a dividend or other distribution with respect to or in exchange for or
in replacement of the shares referenced in (i) and (ii) above.

     1.10  "Management Stock" shall mean (i) shares of Common Stock owned by the
Management Holders or any Permitted Transferee thereof; (ii) shares of Common
Stock issued or issuable upon the conversion or exercise of any stock (including
without limitation the Series A Preferred Stock), options or other securities of
the Company owned by the Management Holders; and (iii) any shares of Common
Stock issued as a dividend or other distribution with respect to or in exchange
for or in replacement of the shares referenced in (i) and (ii) above.

     1.11  "Permitted Transferee" shall mean with respect to a Management
Holder, a member of such Management Holder's immediate family, a trust
established for the benefit of members of such management Holder's immediate
family, or a transferee of such Management Holder by will or the laws of
intestate succession.

     1.12  "Preferred Stock" shall mean, collectively, (i) the Series A
Preferred Stock; (ii) the Series B Preferred Stock; (iii) the Series C Preferred
Stock and (iv) the Series D Preferred Stock.

     1.13  "Qualified Public Offering" shall mean an underwritten public
offering of Common Stock resulting in proceeds to the Company of not less than
$30 million (prior

                                       2
<PAGE>

to expenses and underwriting commissions) and at an offering price per share
equal to at least $8.00 (as appropriately adjusted for future stock splits,
stock dividends, recapitalizations and similar transactions affecting the Common
Stock).

     1.14  "Registrable Securities" shall mean (i) the Investor Stock and (ii)
for purposes of Section 2.2 through and including Section 2.7, shall also
include the Management Stock; provided, however, that Registrable Securities
shall not include any shares of Investor Stock that have previously been
registered under the Securities Act or that have otherwise been sold to the
public in an open-market transaction under Rule 144.

     1.15  The terms "registers," "registered" and "registration" shall refer to
a registration effected by preparing and filing a registration statement in
compliance with the Securities Act and the declaration or ordering of the
effectiveness of such registration statement by the Commission.

     1.16  "Registration Expenses" shall mean all expenses incurred in effecting
any registration pursuant to this Agreement, including without limitation all
registration, qualification and filing fees, printing expenses, escrow fees,
fees and disbursements of counsel for the Company, blue sky fees and expenses,
expenses of any regular or special audits incident to or required by any such
registration, and the fees and expenses of one counsel for the selling holders
of Registrable Securities, but excluding Selling Expenses.

     1.17  "Rule 144" shall mean Rule 144 as promulgated by the Commission under
the Securities Act, as such Rule may be amended from time to time, or any
similar successor Rule that may be promulgated by the Commission.

     1.18  "Rule 145" shall mean Rule 145 as promulgated by the Commission under
the Securities Act, as such Rule may be amended from time to time, or any
similar successor Rule that may be promulgated by the Commission.

     1.19  "Sale of the Company" means the sale of the Company to an Independent
Third Party or group of Independent Third Parties pursuant to which such party
or parties acquire (i) capital stock of the Company possessing the voting power
under normal circumstances to elect a majority of the Company's board of
directors (whether by merger, consolidation or sale or transfer of the Company's
capital stock) or (ii) all or substantially all of the Company's assets
determined on a consolidated basis.

     1.20  "Securities Act" shall mean the Securities Act of 1933 (or any
similar successor federal statute), as amended, and the rules and regulations
thereunder, all as the same shall be in effect from time to time.

                                       3
<PAGE>

     1.21  "Selling Expenses" shall mean all underwriting discounts and selling
commissions applicable to the sale of Registrable Securities.

     1.22  "Series A Preferred Stock" shall mean the Company's Series A
Convertible Preferred Stock, $.01 par value per share.

     1.23  "Series B Preferred Stock" shall mean the Company's Series B
Convertible Preferred Stock, $.01 par value per share.

     1.24  "Series C Preferred Stock" shall mean the Company's Series C
Convertible Preferred Stock, $.01 par value per share.

     1.25  "Series D Preferred Stock" shall mean the Company's Series D
Convertible Preferred Stock, $.01 par value per share.

     1.26  "Subsidiary" shall mean any corporation with respect to which a
person or entity owns a majority of the common stock or has the power to vote
or direct the voting of sufficient securities to elect a majority of the
directors.

                                  Article II

                              Registration Rights

     2.1   Demand Registrations .

           (a)   Request for Registration. At any time or times after the
earlier of the third anniversary of the Closing or the effective date of the
first registration statement filed by the Company under the Securities Act, the
Initiating Holders may require that the Company effect a registration under the
Securities Act up to four times utilizing a registration on Form S-1 or any
similar form (a "Long-Form Registration") and as many times as requested by the
Initiating Holders utilizing a Form S-3 or any similar form, if available (a
"Short-Form Registration") (each a "Demand Registration"). Upon receipt of
written notice of such demand, the Company will promptly give written notice of
the proposed registration to all other holders of Registrable Securities and
will include in such registration all Registrable Securities specified in such
demand, together with all Registrable Securities of any other holder of
Registrable Securities joining in such demand as are specified in a written
request received by the Company within twenty (20) days after delivery of the
Company's notice. Demand Registrations will be Short-Form Registrations whenever
the Company is permitted to use any applicable short form.

           (b)   Deferral of Demand Registration. The Company shall file a
registration statement with respect to each Demand Registration requested
pursuant to Section 2.1(a) as soon as practicable after receipt of the demand of
the Initiating

                                       4
<PAGE>

Holders; provided, however, that if in the good faith judgment of the Board of
Directors of the Company, such registration would be seriously detrimental to
the Company and the Board of Directors concludes, as a result, that it is
advisable to defer the filing of such registration statement at such time (as
evidenced by an appropriate resolution of the Board), then the Company shall
have the right to defer such filing for the period during which such
registration would be seriously detrimental; provided, however, that (i) the
Company may not defer the filing for a period of more than one hundred eighty
(180) days after receipt of the demand of the Initiating Holders, (ii) the
Company shall not exercise its right to defer a Demand Registration more than
once, and (iii) if the Company undertakes a primary registration following an
exercise of its deferral right, the holders of Registrable Securities shall have
"piggyback" rights under Section 2.2 hereof with respect to not less than one-
third (1/3) of the number of shares of Common Stock to be sold in such offering.
In addition, the Company shall not be obligated to effect, or to take any action
to effect, any registration:

                 (i)   in any particular jurisdiction in which the Company would
be required to execute a general consent to service of process in effecting such
registration, qualification or compliance, unless the Company is already subject
to service in such jurisdiction and except as may be required under the
Securities Act; or

                 (ii)  during the period starting with the date 60 days prior to
the Company's good faith estimate of the date of filing of, and ending on a date
180 days after the effective date of, a registration filed pursuant to Section
2.2 hereof; provided that the Company is actively employing in good faith all
reasonable efforts to cause such registration statement to become effective.

           (c)   Underwriting. If the Initiating Holders intend to distribute
the Registrable Securities covered by a Demand Registration by means of an
underwriting, they shall so advise the Company as a part of their demand made
pursuant to Section 2.1 and the Company shall include such information in its
written notice to holders of Registrable Securities. The Initiating Holders
shall have the right to select the managing underwriter(s) for an underwritten
Demand Registration, subject to the approval of the Company's Board of Directors
(which will not be unreasonably withheld or delayed). The right of any holder of
Registrable Securities to participate in an underwritten Demand Registration
shall be conditioned upon such holder's participation in such underwriting in
accordance with the terms and conditions thereof, and the Company and such
holders will enter into an underwriting agreement in customary form.

           (d)   Priorities. The holders of Registrable Securities will have
absolute priority over any other securities included in a Demand Registration.
If other securities are included in any Demand Registration that is not an
underwritten offering, all Registrable Securities included in such offering
shall be sold prior to the sale of any of such other securities. If other
securities are included in any Demand Registration that is

                                       5
<PAGE>

an underwritten offering, and the managing underwriter for such offering advises
the Company that in its opinion the amount of securities to be included exceeds
the amount of securities which can be sold in such offering without adversely
affecting the marketability thereof, the Company will include in such
registration all Registrable Securities requested to be included therein prior
to the inclusion of any other securities. If the number of Registrable
Securities requested to be included in such registration exceeds the amount of
securities which in the opinion of such underwriter can be sold without
adversely affecting the marketability of such offering, such Registrable
Securities shall be included pro rata among the holders thereof based on the
percentage of the outstanding Common Stock held by each such Stockholder
(assuming the conversion of the Preferred Stock and the exercise of all options,
warrants and similar rights held by such Stockholder).

     2.2   Piggyback Registrations .

           (a)   Request for Inclusion. If (but without any obligation to do so)
the Company shall determine to register any of its securities for its own
account or for the account of other security holders of the Company for cash on
any registration form (other than a registration statement relating either to
the sale of securities to employees of the Company pursuant to a stock option,
stock purchase or similar plan, or a Rule 145 transaction or a registration on
any form that does not include substantially the same information as would be
required to be included in a registration statement covering the sale of the
Registrable Securities) which permits the inclusion of Registrable Securities (a
"Piggyback Registration"), the Company will promptly give each holder of
Registrable Securities written notice thereof and, subject to Section 2.2(c),
shall include in such registration all the Registrable Securities requested to
be included therein pursuant to the written requests of holders of Registrable
Securities received within twenty (20) days after delivery of the Company's
notice.

           (b)   Underwriting. If the Piggyback Registration relates to an
underwritten public offering, the Company shall so advise the holders of
Registrable Securities as a part of the written notice given pursuant to Section
2.2(a). In such event, the right of any holder of Registrable Securities to
participate in such registration shall be conditioned upon such holder's
participation in such underwriting in accordance with the terms and conditions
thereof. All holders of Registrable Securities proposing to distribute their
securities through such underwriting shall (together with the Company) enter
into an underwriting agreement in customary form with the representative of the
underwriter or underwriters selected by the Company.

           (c)   Priorities. If such proposed Piggyback Registration is an
underwritten offering and the managing underwriter for such offering advises the
Company that the securities requested to be included therein exceeds the amount
of securities that can be sold in such offering, except as provided in Section
2.1(b), any

                                       6
<PAGE>

securities to be sold by the Company in such offering shall have priority over
any Registrable Securities, and the number of shares to be included by a holder
of Registrable Securities in such registration shall be reduced, but only after
all shares proposed to be sold by employees, officers or directors of the
Company and any other proposed sellers that do not hold Registrable Securities
have been reduced in their entirety, pro rata on the basis of the percentage of
the outstanding Common Stock held by such Stockholder (assuming the conversion
of the Preferred Stock and the exercise of all options, warrants and similar
rights held by such Stockholder) and all other holders exercising similar
registration rights but in no event shall the amount of securities of the
selling holders included in the offering be reduced below fifteen percent (15%)
of the total amount of securities included in such offering, unless such
offering is the initial public offering of the Company's securities, in which
case all of the Registrable Securities of the selling holders may be excluded if
the underwriters make the determination described above.

     2.3   Expenses of Registration . All Registration Expenses incurred in
connection with up to four Long-Form Registrations and all Short-Form and
Piggyback Registrations shall be borne by the Company; provided, however, that
no registration shall count as one of the Company-paid Long Form Registrations
unless the holders of Registrable Securities are able to register and sell at
least 90% of the Registrable Securities requested to be included therein; and
provided, further, that the Company shall not be required to pay for any expense
of any registration proceeding begun pursuant to Section 2.1 if the registration
request is subsequently withdrawn at the request of the holders of a majority of
the Registrable Securities to be registered (in which case all participating
holders of such Registrable Securities to be registered shall bear such
expense), unless the holders of a majority of the Registrable Securities agree
to forfeit their right to one Demand Registration pursuant to Section 2.1. All
Selling Expenses relating to Registrable Securities included in any Demand or
Piggyback Registration shall be borne by the holders of such securities pro rata
on the basis of the number of shares sold by them.

     2.4   Registration Procedures . In the case of each registration effected
by the Company pursuant to this Article II, the Company will keep each holder of
Registrable Securities advised in writing as to the initiation of such
registration and as to the completion thereof. At its expense, the Company will
use its best efforts to:

           (a)   cause such registration to be declared effective by the
Commission and, in the case of a Demand Registration, keep such registration
effective for a period of one hundred eighty (180) days or until the holders of
Registrable Securities included therein have completed the distribution
described in the registration statement relating thereto, whichever first
occurs;

                                       7
<PAGE>

           (b)   prepare and file with the Commission such amendments and
supplements to such registration statement and the prospectus used in connection
with such registration statement (including post-effective amendments) as may be
necessary to comply with the provisions of the Securities Act with respect to
the disposition of all securities covered by such registration statement;

           (c)   obtain appropriate qualifications of the securities covered by
such registration under state securities or "blue sky" laws in such
jurisdictions as may be requested by the holders of Registrable Securities;
provided, however, that the Company shall not be required to file a general
consent to service of process in any jurisdiction in which it is not otherwise
subject to service in order to obtain any such qualification;

           (d)   furnish such number of prospectuses and other documents
incident thereto, including any amendment of or supplement to the prospectus, as
a holder of Registrable Securities from time to time may reasonably request;

           (e)   notify each holder of Registrable Securities covered by such
registration statement, at any time when a prospectus relating thereto is
required to be delivered under the Securities Act, of the happening of any event
as a result of which the prospectus included in such registration statement, as
then in effect, includes an untrue statement of a material fact or omits to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading or incomplete in the light of the
circumstances then existing, and at the request of any such holder, prepare and
furnish to such holder a reasonable number of copies of a supplement to or an
amendment of such prospectus as may be necessary so that, as thereafter
delivered to the purchasers of such shares, such prospectus shall not include an
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary to make the statements therein not misleading or
incomplete in the light of the circumstances then existing;

           (f)   cause all Registrable Securities covered by such registration
to be listed on each securities exchange or inter-dealer quotation system on
which similar securities issued by the Company are then listed;

           (g)   provide a transfer agent and registrar for all Registrable
Securities covered by such registration and a CUSIP number for all such
Registrable Securities, in each case not later than the effective date of such
registration;

           (h)   otherwise comply with all applicable rules and regulations of
the Commission, and make available to its security holders, as soon as
reasonably practicable, an earnings statement covering the period of at least
twelve months, but not more than 18 months, beginning with the first month after
the effective date of the

                                       8
<PAGE>

registration statement, which earnings statement shall satisfy the provisions of
Section 11(a) of the Securities Act; and

           (i)   in connection with any underwritten Demand Registration, the
Company will enter into an underwriting agreement reasonably satisfactory to the
Initiating Holders containing customary underwriting provisions, including
indemnification and contribution provisions.

     2.5   Indemnification.

           (a)   The Company will indemnify each holder of Registrable
Securities, each of such holders' officers, directors, partners, agents,
employees and representatives, and each person controlling such holder within
the meaning of Section 15 of the Securities Act, with respect to each
registration, qualification or compliance effected pursuant to this Article II,
against all expenses, claims, losses, damages and liabilities (or actions,
proceedings or settlements in respect thereof) arising out of or based on any
untrue statement (or alleged untrue statement) of a material fact contained in
any prospectus, offering circular or other document (including any related
registration statement, notification or the like) incident to any such
registration, qualification or compliance, or based on any omission (or alleged
omission) to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, or any violation by the
Company of the Securities Act or any rule or regulation thereunder applicable to
the Company and relating to action or inaction required of the Company in
connection with any such registration, qualification or compliance, and will
reimburse each such indemnified person for any legal and any other expenses
reasonably incurred in connection with investigating and defending or settling
any such claim, loss, damage, liability or action; provided, however, that the
Company will not be liable in any such case to the extent that any such claim,
loss, damage, liability or expense arises out of or is based on any untrue
statement or omission based upon written information furnished to the Company by
such holder of Registrable Securities and stated to be specifically for use
therein. It is agreed that the indemnity agreement contained in this Section
2.5(a) shall not apply to amounts paid in settlement of any such loss, claim,
damage, liability or action if such settlement is effected without the consent
of the Company (which consent has not been unreasonably withheld).

           (b)   Each holder of Registrable Securities included in any
registration effected pursuant to this Article II shall indemnify the Company,
each of its directors, officers, agents, employees and representatives, and each
person who controls the Company within the meaning of Section 15 of the
Securities Act, each other such holder of Registrable Securities and each of
their officers, directors and partners, and each person controlling such
holders, against all claims, losses, damages and liabilities (or actions in
respect thereof) arising out of or based on any untrue statement (or alleged

                                       9
<PAGE>

untrue statement) of a material fact contained in any such registration
statement, prospectus, offering circular or other document, or any omission (or
alleged omission) to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading, and will reimburse
such indemnified persons for any legal or any other expenses reasonably incurred
in connection with investigating or defending any such claim, loss, damage,
liability or action, in each case to the extent, but only to the extent, that
such untrue statement (or alleged untrue statement) or omission (or alleged
omission) is made in such registration statement, prospectus, offering circular
or other document in reliance upon and in strict conformity with written
information furnished to the Company by such holder of Registrable Securities;
provided, however, that (x) no holder of Registrable Securities shall be liable
hereunder for any amounts in excess of the net proceeds received by such holder
pursuant to such registration, and (y) the obligations of such holder of
Registrable Securities hereunder shall not apply to amounts paid in settlement
of any such claims, losses, damages or liabilities (or actions in respect
thereof) if such settlement is effected without the consent of such holder
(which consent has not been unreasonably withheld).

           (c)   Each party entitled to indemnification under this Section 2.5
(the "Indemnified Party") shall give notice to the party required to provide
indemnification (the "Indemnifying Party") promptly after such Indemnified Party
has actual knowledge of any claim as to which indemnity may be sought, and shall
permit the Indemnifying Party to assume the defense of any such claim or any
litigation resulting therefrom, provided that counsel for the Indemnified Party,
who shall conduct the defense of such claim or any litigation resulting
therefrom, shall be approved by the Indemnified Party (whose approval shall not
unreasonably be withheld), and the Indemnified Party may participate in such
defense at such party's expense, and provided further that the failure of any
Indemnified Party to give notice as provided herein shall not relieve the
Indemnifying Party of its obligations under this Section 2.5 to the extent such
failure is not prejudicial. No Indemnifying Party in the defense of any such
claim or litigation shall, except with the consent of each Indemnified Party,
consent to entry of any judgment or enter into any settlement which does not
include an unconditional release of such Indemnified Party from all liability in
respect to such claim or litigation. Each Indemnified Party shall furnish such
information regarding itself or the claim in question as an Indemnifying Party
may reasonably request in writing and as shall be reasonably required in
connection with defense of such claim and litigation resulting therefrom.

           (d)   If the indemnification provided for in this Section 2.5 is held
by a court of competent jurisdiction to be unavailable to an Indemnified Party
with respect to any loss, liability, claim, damage or expense referred to
therein, then the Indemnifying Party, in lieu of indemnifying such Indemnified
Party hereunder, shall contribute to the amount paid or payable by such
Indemnified Party as a result of such loss, liability,

                                      10
<PAGE>

claim, damage or expense in such proportion as is appropriate to reflect the
relative fault of the Indemnifying Party on the one hand and of the Indemnified
Party on the other in connection with the statements or omissions which resulted
in such loss, liability, claim, damage or expense as well as any other relevant
equitable considerations. The relative fault of the Indemnifying Party and of
the Indemnified Party shall be determined by reference to, among other things,
whether the untrue or alleged untrue statement of a material fact or the
omission to state a material fact relates to information supplied by the
Indemnifying Party or by the Indemnified Party and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission.

           (e)   Notwithstanding the foregoing, to the extent that the
provisions on indemnification and contribution contained in an underwriting
agreement entered into in connection with an underwritten public offering are in
conflict with the foregoing provisions, the provisions in the underwriting
agreement shall control.

     2.6   Other Obligations.  With a view to making available the benefits of
certain rules and regulations of the Commission which may effectuate the
registration of Registrable Securities or permit the sale of Registrable
Securities to the public without registration, the Company agrees to:

           (a)   after its initial registration under the Securities Act,
exercise best efforts to cause the Company to be eligible to utilize Form S-3
(or any similar form) for the registration of Registrable Securities;

           (b)   at such time as any Registrable Securities are eligible for
transfer under Rule 144(k), upon the request of the holder of such Registrable
Securities, remove any restrictive legend from the certificates evidencing such
securities at no cost to such holder;

           (c)   make and keep available public information as defined in Rule
144 under the Securities Act at all times from and after ninety (90) days
following its initial registration under the Securities Act;

           (d)   file with the Commission in a timely manner all reports and
other documents required of the Company under the Securities Act and the
Exchange Act at any time after it has become subject to such reporting
requirements; and

           (e)   furnish any holder of Registrable Securities upon request a
written statement by the Company as to its compliance with the reporting
requirements of Rule 144 (at any time from and after the effective date of the
first registration statement filed by the Company for an offering of its
securities to the general public), and of the Securities Act and the Exchange
Act (at any time after it has become subject to such

                                      11
<PAGE>

reporting requirements), a copy of the most recent annual or quarterly report of
the Company, and such other reports and documents as a holder of Registrable
Securities may reasonably request in availing itself of any rule or regulation
of the Commission (including Rule 144A) allowing a holder of Registrable
Securities to sell any such securities without registration.

     2.7   Termination of Registration Rights. The right of any holder of
Registrable Securities to request inclusion of Registrable Securities in any
registration pursuant to this Article II shall terminate when (i) all
Registrable Securities beneficially owned by such holder of Registrable
Securities may immediately be sold under Rule 144(k), and (ii) the Company's
Common Stock is listed on a national securities exchange or traded in The Nasdaq
Stock Market; provided, however, that the provisions of this Section 2.7 shall
not apply to any holder of Registrable Securities holding more than five percent
(5%) of the Company's then-outstanding Common Stock.

     2.8   Transfer of Registration Rights.  The rights to cause the Company to
register securities granted to the holders under Sections 2.1 and 2.2 and
associated obligations including the standoff agreement in ARTICLE VII below may
be assigned to any transferee or assignee  in connection with any transfer or
assignment of Registrable Securities by the holder provided that the transferor
provides the Company with written notice of the proposed transfer and the
transferee agrees in writing to be bound by the provisions of this Agreement.

                                  Article III
                 Restrictions On Transfer Of Management Stock

     3.1   Rights of First Refusal. No shares of Management Stock or any
interest therein may be transferred other than in compliance with the provisions
of this Article III. If at any time a Management Holder receives a bona fide
offer from any person (a "Third Party") to purchase shares of Preferred Stock
and/or Common Stock or any interest therein held by such Management Holder (a
"Third-Party Offer") which such Management Holder wishes to accept, such
Management Holder shall cause such Third-Party Offer to be reduced to writing
and shall notify the Company and each holder of Investor Stock of such
Management Holder's desire to accept the Third-Party Offer. The Management
Stockholder's notice (the "Sale Notice") shall contain an irrevocable offer to
sell such Preferred Stock and/or Common Stock to the Company and/or the
Investors at a purchase price equal to the price contained in, and on the same
terms and conditions of, the Third-Party Offer and shall be accompanied by a
true copy of the Third-Party Offer (which shall identify the offeror) provided,
however, the Company and the Investors may pay cash to the selling Management
Holder equal in amount to the fair market value of any non-cash consideration
offered by the Third Party in the Third-Party Offer. At any time within 10
business days after the date of receipt by the Company of the Sale Notice, the
Company shall have the right to purchase the Preferred

                                      12
<PAGE>

Stock and/or Common Stock covered by the Third-Party Offer at the same price and
on the same terms and conditions as the Third-Party Offer. If at the end of such
10-business day period the Company has not elected to purchase all Preferred
Stock and Common Stock covered by such Third-Party Notice, the Management Holder
shall provide the Sale Notice to the Investors along with a statement as to the
number of shares to be purchased by the Company (if any). Within 10 business
days after receipt by the Investors of such Sale Notice, each Investor (or any
Affiliate thereof), by providing notice to the Management Holder, shall have the
right to purchase that portion of the shares equal to the Investors Pro Rata
Number of Shares (as defined below) at the same price and on the same terms and
conditions as the Third-Party Offer. In the event any Investor (or an Affiliate
thereof) does not exercise its right to purchase its respective Investors Pro
Rata Number of Shares, the other Investors shall have the right to purchase such
shares, and the purchase of such shares shall be allocated among the
participating Investors (or any participating Affiliates thereof) pro rata in
proportion to the Investor Stock held by such Investors, or in such other
proportions as the participating Investors (and such Affiliates) may agree upon.
To the extent the Investors have not notified the selling Management Holder in
writing of a desire to purchase all of the Preferred Stock and Common Stock as
set forth herein, the selling Management Holder may within 60 days thereafter
sell the remaining Management Stock covered by the Third-Party Offer to the
Third Party on the terms set forth in the original Third-Party Offer. Any
Management Stock covered by the Third Party Offer that is not so transferred
during such 60-day period shall again be subject to this Section 3.1. The
Company may assign its rights to purchase Management Stock pursuant to this
Section 3.1 to one or more third parties subject only to compliance with
applicable securities laws, provided that the Company shall offer to assign such
rights to the Investors pro rata prior to offering such rights to other persons.
For purposes of this Section 3.1 such Investors Pro Rata Number of Shares shall
be equal to that number of shares of Preferred Stock and/or Common Stock derived
by multiplying the total number of shares to be purchased by the Third Party as
set forth in the Sale Notice by a fraction, the numerator of which is the total
number of shares of Investor Stock beneficially owned by such participating
holder of Investor Stock and the denominator of which is the total number of
shares beneficially owned by all holders of Investor Stock.

     3.2   Co-Sale Rights. If neither the Company nor the Investors has elected
to purchase all of the Management Stock specified in the Sale Notice pursuant to
Section 3.1 above, each Investor may elect to participate in the contemplated
transfer by delivering written notice to the Management Holder and the Company
within 15 business days after receipt by the Investor of the Sale Notice. If any
Investor has elected to participate in such sale, the Management Holder and the
electing Investors will be entitled to sell in the contemplated sale, at the
same price and on the same terms, a number of shares of the Company's Common
Stock equal to the product of (i) the quotient determined by dividing the
percentage of the Company's Common Stock (on a fully-diluted basis) held by such
person, by the aggregate percentage of the Company's Common Stock (on a

                                      13
<PAGE>

fully-diluted basis) owned by the Management Holder and all electing Investors
and (ii) the number of shares of Common Stock to be sold in the contemplated
sale.

     For Example, if the Sale Notice contemplated a sale of 100 shares of Common
     Stock, and if the Management Holder was at such time the owner of 30% of
     the Company's Common Stock (on a fully-diluted basis) and if one Investor
     elected to participate and the Investor owned 20% of the Company's Common
     Stock (on a fully-diluted basis), the Management Holder would be entitled
     to sell 60 shares (30% / 50% x 100 shares) and the Investor would be
     entitled to sell 40 shares (20% / 50% x 100 shares).

 If the Management Holder is selling Preferred Stock, the calculation set forth
 above shall be done assuming conversion of the Preferred Stock.  The Investors
 participating in such a sale of Preferred Stock by a Management Holder shall
 have the option of selling Preferred Stock or Common Stock.  The Management
 Holder will use his best efforts to obtain the agreement of the prospective
 transferee(s) to the participation of the Investors in the contemplated
 transfer and will not transfer any Management Stock to the prospective
 transferee(s) if such transferee(s) refuses to allow the participation of
 Investors.

     3.3   Exempt Transactions.  The restrictions set forth in this Article III
shall not apply to transfers of Management Stock to a Permitted Transferee of
the transferring Management Holder; provided, however, that such Permitted
Transferee shall agree in writing to be bound by such restrictions in connection
with subsequent transfers.

     3.4   Assignment of First Refusal Right. The Company has (a) adopted its
1997 Stock Option/Stock Issuance Plan (the "Stock Plan") and (b) granted Stock
Options to certain of its employees (the "Optionees") (the documents referred to
in (a) and (b) are collectively defined as the "Stock Plan Agreements"). The
Stock Plan Agreements contain provisions granting the Company certain repurchase
rights and rights of first refusal with respect to Common Stock held by the
Optionees. In the event the Company elects not to exercise such repurchase
rights and rights of first refusal, the Company agrees to assign such
unexercised rights to the Investors (or any Affiliate designated by any
Investor). Any unexercised right shall be assigned at least 10 days prior to its
expiration. The Investors shall be permitted to purchase their Pro Rata Number
of Shares of any Common Stock being offered and the offer shall be conducted in
accordance with the procedures set forth in Section 3.1 of this Agreement. To
the extent any of the provisions of the Stock Plan Agreements and this Section
3.4 are inconsistent

                                      14
<PAGE>

with the provisions of Section 3.1 or 3.2 above, the provisions of Sections 3.1
and 3.2 shall govern.

                                  Article IV
                          Right of First Notification

     4.1   For so long as Intel Corporation ("Intel") owns at least seventy five
percent (75%) of the Series D Preferred owned by it (including any Common Stock
into which Series D Preferred Stock has been converted) as of the date of this
Agreement, in the event that the Board of Directors of the Company (i) receives
a bona fide offer to be acquired by means of (x) a merger, consolidation or
other business combination  pursuant to which the stockholders of the Company
immediately prior to the effective date of such transaction have beneficial
ownership of  less than fifty percent (50%) of the total combined voting power
for election of directors of the surviving corporation immediately following
such transaction, or (y) the sale of all or substantially all of the assets of
the Company, or (ii) votes to initiate a sale to any other person or entity of
(xx) fifty (50%) percent or more of the total voting power of the Company, or
(yy) all or substantially all of the Company's assets, prior to accepting such
acquisition proposal or initiating such sale, the Company shall provide to Intel
written notice within 24 hours (the "Notice") of the proposed terms of such
acquisition proposal or sale.  The Notice shall set forth the specific terms of
the acquisition proposal or the initiation of a sale of the Company.  Further,
the Company shall provide Intel with access to (and copies of, if requested) all
documents containing nonpublic information of the Company that are or have been
supplied to the party making the acquisition proposal.  In its discretion, Intel
shall have eight business days (which time period may be extended by mutual
written agreement) following its receipt of the Notice ("the Negotiation
Period") in which to present an offer to acquire the Company (the "Intel
Offer"), which the Company shall be under no obligation to accept. If, however,
the Company elects to pursue the Intel Offer, then the Company will provide
Intel written acknowledgment of such election.  The parties agree to negotiate
in good faith for a period of  ten (10) business days (which may be extended by
mutual written agreement) after Intel's receipt of the Company's written
acknowledgment to pursue Intel's Offer, to reach agreement on mutually agreeable
terms.

     4.2   In the event that (i) Intel does not deliver an Intel Offer to the
Company within eight business days  (or other mutually agreed upon time period,
as set forth above), after its receipt of the Notice;  (ii) the Company elects
not to accept Intel's Offer; or (iii) within the ten (10) business days (or
other mutually agreed upon time period, as set forth above) following the
Company's acknowledgment of its desire to pursue the Intel Offer, Intel  and the
Company do not mutually agree to the terms of an agreement for an acquisition of
the Company, then, and only then, the right of first negotiation of Intel
hereunder shall expire with respect to such acquisition proposal or initiation
of a sale and the Company shall be free thereafter to enter into a definitive
agreement with a third party for an acquisition or sale of the Company.

                                      15
<PAGE>

     4.3   This right is applicable only to Intel and is not transferable or
assignable by Intel.

                                   Article V
                           Covenants Of The Company

     The Company hereby covenants and agrees, so long as any Registrable
Securities are outstanding, as follows:

     5.1   Basic Financial Information.  The Company will furnish the following
reports to each of the Investors  holding at  least 500,000 shares(as adjusted
for stock splits, stock dividends and similar transactions) of the outstanding
Registrable Securities:

           (a)   As soon as practicable after the end of each fiscal year of the
Company, and in any event within ninety (90) days thereafter, a consolidated
balance sheet of the Company and its subsidiaries, if any, as of the end of such
fiscal year, and consolidated statements of income and cash flow of the Company
and its subsidiaries, if any, for such year, prepared in accordance with
generally accepted accounting principles consistently applied and setting forth
in each case in comparative form the figures for the previous fiscal year, all
in reasonable detail and certified by independent public accountants of
recognized national standing selected by the Company.

           (b)   As soon as practicable after the end of each quarterly
accounting period in each fiscal year of the Company, and in any event within
forty-five (45) days thereafter, a consolidated balance sheet of the Company and
its subsidiaries, if any, as of the end of each such quarterly period, and
consolidated statements of income and cash flow of the Company and its
subsidiaries, if any, for such period and for the current fiscal year to date,
prepared in accordance with generally accepted accounting principles
consistently applied and setting forth in comparative form the figures for the
corresponding periods of the previous fiscal year, subject to changes resulting
from normal year-end audit adjustments, all in reasonable detail and certified
by the chief financial officer of the Company (or the chief accounting officer
if no chief financial officer is in place), except that such statements need not
contain the notes required by generally accepted accounting principles.

           (c)   As soon as practicable after the end of each monthly accounting
period and in any event within thirty (30) days thereafter, a consolidated
balance sheet of the Company and its subsidiaries, if any, as of the end of such
month and consolidated statements of income and of cash flow of the Company and
its subsidiaries, if any, for each month and for the current fiscal year of the
Company to date, all subject to normal year-end audit adjustments, prepared in
accordance with generally accepted accounting principles consistently applied
and certified by the chief financial officer of the

                                      16
<PAGE>

Company (or the chief accounting officer if no chief financial officer is in
place), except that such statements need not contain the notes required by
generally accepted accounting principles.

           (d)   Subsequent to the Company's initial public offering, the
Company will deliver to all holders of greater than or equal to 500,000 shares
(as adjusted for stock splits, stock dividends and similar transactions) of the
Registrable Securities, copies of all reports required to be filed by the
Company pursuant to the requirements of the Securities Exchange Act of 1934, as
amended.

     5.2   Additional Information Rights.

     (a)   The Company will permit each of the Investors (for so long as such
Investor beneficially owns greater than or equal to 500,000 shares(as adjusted
for stock splits, stock dividends and similar transactions) of the  Registrable
Securities) and/or their respective representatives to visit and inspect any of
the properties of the Company, including its books of account and other records
(and make copies thereof and take extracts therefrom), and to discuss its
affairs, finances and accounts with the Company's officers and its independent
public accountants, all at such reasonable times and as often as any such person
may reasonably request during the Company's normal business hours; provided that
any person or persons exercising rights under this Section 5.2(a) shall (i) use
all reasonable efforts to ensure that any such examination or visit results in a
minimum of disruption to the operations of the Company and (ii) agree in writing
to keep any proprietary information of the Company disclosed to such person in
the course of such inspection confidential in a manner consistent with prudent
business practices and treatment of such person's or persons' own confidential
information and not use such proprietary information for any purpose other than
in connection with such Investor's or such transferee's ownership of an interest
in the Company; provided, further, that the disclosure of confidential
information to Intel shall be governed by the terms of the Corporate Non-
Disclosure Agreement No. 2087874 dated March 23, 1999 and any Confidential
Information Transmittal Records provided in connection therewith.
Notwithstanding the foregoing, the Company reserves the right to omit such
information as the Company's Board of Directors unanimously deems to be
confidential and the disclosure of which could be to the material detriment of
the Company's best interests.

     (b)   The Company will deliver the reports described below in this Section
5.2(b) to each of the Investors:

           (i)   Annually (but in any event at least thirty (30) days prior to
the commencement of each fiscal year of the Company) the financial plan of the
Company, in such manner and form as approved by the Board of Directors of the
Company, which

                                      17
<PAGE>

financial plan shall include an operating budget for such fiscal year and an
updated five-year strategic plan for the Company.

           (ii)  Concurrently with delivery thereof, copies of all reports and
other written material submitted to the Board of Directors.

           (iii) Concurrently with delivery thereof, copies of any reports or
communications delivered to the financial community, including all press
releases.

     (c)   Each of the Investors hereby agrees to hold in confidence and trust
and not to misuse or disclose any confidential information provided pursuant to
this Section 5.2; provided, however, that an Investor shall not be prohibited
from using any such information for the purpose of generating and delivering
portfolio valuation information to its investors.

     5.3   Prompt Payment of Taxes, Etc. The Company will promptly pay and
discharge, or cause to be paid and discharged, when due and payable, all lawful
taxes, assessments and governmental charges or levies imposed upon the income,
profits, property or business of the Company or any subsidiary; provided,
however, that any such tax, assessment, charge or levy need not be paid if the
validity thereof shall currently be contested in good faith by appropriate
proceedings and if the Company shall have set aside on its books adequate
reserves with respect thereto; and provided, further, that the Company will pay
all such taxes, assessments, charges or levies forthwith upon the commencement
of proceedings to foreclose any lien which may have attached as security
therefore. The Company will promptly pay or cause to be paid when due, in
conformance with customary trade terms, all other uncontested obligations
incident to the operations of the Company and material thereto individually or
in the aggregate.

     5.4   Maintenance of Properties and Leases. The Company will keep its
properties and those of its subsidiaries, if any, in good repair, working order
and condition, reasonable wear and tear excepted, and from time to time make all
needful and proper repairs, renewals, replacements, additions and improvements
thereto; and the Company and its subsidiaries will at all times comply with each
material provision of all leases to which any of them is a party or under which
any of them occupies property if the breach of such provision might have a
material and adverse effect on the condition, financial or otherwise, or
operations of the Company.

     5.5   Insurance.

     (a)   The Company will keep its assets, and those of its subsidiaries,
which are of an insurable character insured by financially sound and reputable
insurers against loss or damage by fire, explosion and other risks customarily
insured against by companies in

                                      18
<PAGE>

the Company's line of business, and the Company will maintain, with financially
sound and reputable insurers, insurance against other hazards and risks and
liability to persons and property to the extent and in the manner customary for
companies in similar businesses similarly situated.

     (b)   Within 60 days of the Initial Closing, the Company shall have
obtained from financially sound and reputable insurance companies, life
insurance policies, if available on commercially reasonable terms, on each of
the lives of Paul A. Berberian, James M. LeJeal and Todd H. Vernon, in the
amount of $2,000,000 each, which policies shall name the Company a loss payee,
and the Company shall maintain such life insurance policies.

     5.6   Accounts and Records. The Company will keep true records and books of
account in which full, true and correct entries will be made of all dealings or
transactions in relation to its business and affairs.

     5.7   Independent Accountants. The Company will retain a "Big Five"
national accounting firm as its independent public accountants who shall certify
the Company's financial statements at the end of each fiscal year. Once such
"Big Five" accounting firm is selected, its services shall not be terminated
unless the holders of at least 51% of the Investor Stock consent to such
termination of services. In the event the Company determines to terminate the
services of the independent public accountants so selected, the Company will
promptly thereafter notify the holders of Investor Stock of such termination and
the reasons therefor. In its notice to the holders of Investor Stock the Company
shall state whether the change of accountants was recommended or approved by the
Board of Directors of the Company or any committee thereof. In the event such
termination takes place, the Company will promptly thereafter engage another
"Big Six" national accounting firm as its independent public accountants.

     5.8   Compliance with Laws. The Company and all its subsidiaries shall duly
observe and conform to all applicable laws and valid requirements of
governmental authorities relating to the conduct of their businesses or to their
properties or assets.

     5.9   Maintenance of Corporate Existence, Etc. The Company shall maintain
in full force and effect its corporate existence, rights and franchises and all
licenses and other rights in or to use patents, processes, licenses, trademarks,
trade names or copyrights owned or possessed by it or any subsidiary and deemed
by the Company to be necessary to the conduct of their business and material
thereto.

     5.10  Transactions with Affiliates. The Company shall not and shall not
permit any Subsidiary of the Company to enter into or be a party to any
transaction with any Affiliate of the Company or such Subsidiary, except (i)
transactions expressly permitted hereby, (ii) transactions in the ordinary
course of and pursuant to the

                                      19
<PAGE>

reasonable requirements of the Company's or such Subsidiary's business and upon
fair and reasonable terms that are fully disclosed to the Investors and are no
less favorable to the Company or such Subsidiary than would be obtained in a
comparable arm's-length transaction with a person not an Affiliate of the
Company or such Subsidiary, (iii) transactions between the Company and its
wholly-owned Subsidiaries or between such Subsidiaries and (iv) payment of
compensation to employees and directors' fees.

     5.11  Limited First Refusal Rights.

     (a)   Except for the issuance of Common Stock or any securities containing
options or rights to acquire any shares of Common Stock ("Equity Securities")
(i) to the Company's employees, consultants, officers or directors pursuant to
any stock option plan, stock purchase or stock bonus plan, arrangement or
agreement, as approved by the Company's Board of Directors, (ii) upon the
conversion of the Preferred Stock, (iii) pursuant to a Qualified Public
Offering, (iv) pursuant to a merger, consolidation, acquisition or similar
business combination approved by the Company's Board of Directors, (v) in
connection with any stock split, stock dividend, or recapitalization, (vi) to a
lender or equipment lessor in connection with any loan or lease financing
transaction, or (vii) in connection with strategic transactions involving the
Company and other entities (including (x) joint ventures, manufacturing,
marketing or distribution arrangements or (y) technology transfer or development
arrangements; provided, however, that such strategic transactions and the
issuance of shares therein, have been approved by the Company's Board of
Directors), (viii) securities issued to vendors or customers or other persons in
similar commercial situations with the Company if such issuance is approved by
the Board of Directors or (ix) any right, option or warrant to acquire any
security convertible into securities excluded pursuant to (i) through (viii)
above, if the Company authorizes the issuance or sale of any Equity Securities,
the Company shall first offer to sell to each of the holders of Investor Stock
(or any Affiliates designated by such holder) its "pro rata portion" of such
Equity Securities. A holder's "pro rata portion" shall equal the quotient
determined by dividing (1) the number of shares of Investor Stock held by each
such holder by the (2) sum of the total number of shares of Investor Stock held
by all holders of Investor Stock. Each holder of Investor Stock (or such
Affiliates) shall be entitled to purchase such Equity Securities at the most
favorable price and on the most favorable terms as such Equity Securities are to
be offered to any other Persons. The purchase price for all Equity Securities
offered to the holders of the Investor Stock shall be payable in cash or, to the
extent otherwise required hereunder, notes issued by such holders.

     (b)   In order to exercise its purchase rights hereunder, a holder of
Investor Stock (or such Affiliate) must within 7 business days after receipt of
written notice from the Company describing in reasonable detail the Equity
Securities being offered, the purchase price thereof, the payment terms and such
holder's percentage allotment

                                      20
<PAGE>

deliver a written notice to the Company describing its election hereunder. If
all of the Equity Securities offered to the holders of Investor Stock (or their
Affiliates) are not fully subscribed by such holders, the remaining Equity
Securities shall be reoffered by the Company to the holders of Investor Stock
purchasing their full allotment upon the terms set forth in this paragraph,
except that such holders must exercise their purchase rights within five days
after receipt of such reoffer.

     (c)   Upon the expiration of the offering periods described above, the
Company shall be entitled to sell such Equity Securities which the holders of
Investor Stock have not elected to purchase during the 90 days following such
expiration on terms and conditions no more favorable to the purchasers thereof
than those offered to such holders. Any Equity Securities offered or sold by the
Company after such 90-day period must be reoffered to the holders of Investor
Stock pursuant to the terms of this section.

                                  Article VI
                             Corporate Governance

     6.1   Board of Directors.

           (a)   Concurrently with the Closing and at all times thereafter, each
Stockholder agrees to vote all securities of the Company over which such
Stockholder has voting control and to take all other necessary or desirable
actions within its control (whether as a stockholder, director or officer of the
Company or otherwise, and including without limitation attendance at meetings in
person or by proxy for purposes of obtaining a quorum and execution of written
consents in lieu of meetings), and the Company shall take all necessary and
desirable actions within its control (including, without limitation, calling
special board and stockholder meetings), so that:

                 (i)   the Company shall have a Board of Directors comprised of
no more than seven members;

                 (ii)  the following persons shall be elected to the Board of
Directors:

                       (A)   One representative designated by the holders of a
majority of the outstanding Management Stock (the "Management Director");
provided that, until the next annual meeting of the Company's stockholders, Paul
Berberian shall serve as the Management Director;

                       (B)   One representative designated by the holders of a
majority of the outstanding Series A Preferred Stock (the "Series A Preferred
Director"); provided that until the next annual meeting of the Company's
stockholders, Jim LeJeal shall serve as the Series A Director;

                                      21
<PAGE>

                       (C)   One representative designated by the holders of a
majority of the outstanding Series B Preferred Stock (the "Series B Preferred
Director") (collectively with the Series C Preferred Director (as defined
below), the "Investor Directors"); provided that, until the next annual meeting
of the Company's stockholders, Donald H. Parsons, Jr. of The Centennial Funds
("Centennial") shall serve as the Series B Preferred Director; and, provided
further, that in the event that the holders of a majority of the Series B
Preferred Stock do not exercise their right to designate an Investor Director
pursuant to this paragraph (C), Centennial shall have the right to designate a
board observer for so long as Centennial owns, through one or more of its
affiliated entities, at least 500,000 shares (subject to adjustment for stock
splits, stock dividends and similar transactions) of the Registrable Securities;

                       (D)   One representative designated by the holders of a
majority of the outstanding Series C Preferred Stock (the "Series C Preferred
Director"); provided that until the next annual meeting of the Company's
stockholders, Bradley Feld, as a representative of SoftBank, shall serve as the
Series C Director;

                       (E)   One representative designated by the holders of a
majority of the outstanding Series D Preferred Stock subject to the approval of
the entire Board (the "Series D Preferred Director"); provided that the Board
seat to be held by such representative shall be filled by an Outside Director
(as defined below) until such date at which the Company has sold an aggregate of
33,333,334 shares of Series D Preferred Stock. Notwithstanding the above,
Centennial shall have the right to designate such Series D Director (who shall
not be affiliated with either the Company, Centennial or any of the Investors)
subject to the approval of the entire Board of Directors, so long as (i)
Centennial has purchased an aggregate of 6,558,334 shares of Series D Preferred
Stock on or as of an Additional Closing (as defined in the Series D Stock
Purchase Agreement) and (ii) Centennial holds at least eighteen percent (18%)of
the Series D Preferred Stock outstanding immediately following such Additional
Closing; and

                       (F)   Three directors designated by a majority of the
Board of Directors until such time as a Series D Director is designated pursuant
to paragraph (E) above, and thereafter two directors (the "Outside Directors");
provided that no such Outside Director is a member of the Company's management
or an employee of the Company or its Subsidiaries; and provided further that,
Byron Chrisman, G. Jackson Tankersley, Jr. and Carol deB. Whittaker shall
initially serve as the Outside Directors.

                 (iii) in the event that any director for any reason ceases to
serve as a member of the Board during his term of office, the resulting vacancy
on the Board shall be filled by a majority vote of the Stockholders entitled to
elect such director as provided in this Section 6.1;

                                      22
<PAGE>

                 (iv)  if the Stockholders fail to designate a representative to
fill a directorship pursuant to the terms of this Section 6.1, the election of
such director shall be accomplished in accordance with the Company's certificate
of incorporation and bylaws and applicable law; and

                 (v)   each of the Stockholders agrees to vote all shares of
stock owned by it for the removal of a director whenever (but only whenever)
there shall be presented to the Board of Directors the written direction that
such director be removed by a majority of the Stockholders entitled to elect the
director.

                 (vi)  Each of Highland Capital Partners III Limited Partnership
("Highland"), Intel Corporation ("Intel"), Excite, Inc. ("Excite") Pequot
Private Equity Fund II, L.P. ("Pequot"), GE Capital Equity Investments, Inc.
("GE") and Matsushita Electric Industrial Co., Ltd. ("Panasonic") for so long as
each of them owns greater than or equal to 500,000 shares (subject to adjustment
for stock dividends, stock splits and similar transactions) of the Registrable
Securities shall be entitled to designate one representative (each an "Observer"
and, collectively, the "Observers") to attend and observe all meetings of the
Company's Board of Directors and all committees thereof (whether in person,
telephonic or otherwise) in a non-voting observer capacity and to receive all
notices and information forwarded by the Company to its directors and copies of
the minutes of all meetings; provided, however, that the Company may require any
such Observer to execute a nondisclosure/confidentiality agreement prior to
disclosing confidential information to such Observer and the right to omit such
information as the Company's Board of Directors unanimously deems to be
confidential and the disclosure of which could be to the material detriment of
the Company and; provided, further, that the disclosure of confidential
information to the Intel Observer shall be governed by the terms of the
Corporate Non-Disclosure Agreement No. 2087874, dated March 23, 1999, and any
Confidential Information Transmittal Records provided in connection therewith.
The Observers may participate in discussions of matters brought to the Board at
the sole discretion of the Board

           (b)   To the extent that any provision of the Company's certificate
of incorporation or bylaws is inconsistent with the provisions of this
Agreement, the Stockholders agree to take all actions necessary to effect such
amendments to the certificate of incorporation or bylaws as may be necessary and
appropriate to give full effect to the provisions of this Agreement.

     6.2   Meetings of the Board. The Board of Directors will meet at least six
times each calendar year in accordance with an agreed-upon schedule. One such
meeting will be held at the same time and place that a national trade conference
is held for the Company's industry. Within six months of the Closing, subject to
reasonable economic feasibility, the Company will implement video
teleconferencing (specifically,

                                      23
<PAGE>

one which is compatible with Centennial's video teleconferencing system) to
facilitate board, committee and other meetings with the Investors.

     6.3   Committees.  Promptly after the Closing, the Board of Directors will
establish audit, nominating and compensation committees and shall delegate to
such committees those duties and powers as are customarily performed by
committees of such type.  The audit committee shall not include any of the
Management Directors.  At least one of the  directors appointed pursuant to
Section 6.1(a)(ii)(C), (D) or (E) shall be a member of each such committee.

     6.4   Reimbursement of Expenses.  The reasonable travel expenses of each
Investor Director (or observer if an Investor is no longer represented on the
Board) and the  Observers incurred in attending or observing Board or committee
meetings shall be reimbursed by the Company.  If the Company adopts any plan or
arrangement to compensate all of its "outside" or "independent" directors
generally for service as a director either with cash or with stock options, then
the Company will also extend the same compensation to the Investor Directors
and, in the case of stock options, such options shall be freely transferable by
the Investor Directors to their respective firms.

     6.5   Certain Approvals. Without the approval of a majority of the Investor
Directors, the Company shall not (i) engage any underwriter or placement agent
for any public or private offering of securities other than an investment
banking firm of recognized national reputation, (ii) issue any stock or options
to employees of the Company that are not subject to vesting and/or buy-back
restrictions, or (iii) waive or accelerate any vesting or buy-back restrictions
with respect to Management Stock.

                                  Article VII
                                 Miscellaneous

     7.1   Governing Law. This Agreement shall be governed in all respects by
the laws of the State of Colorado as such laws are applied to agreements between
Colorado residents entered into and performed entirely in Colorado, except that
the General Corporation Law of the State of Delaware shall govern as to matters
of corporate law. The parties hereto waive all right to trial by jury in any
action or proceeding to enforce or defend any rights under this Agreement.

     7.2   "Market Stand-Off" Agreement. Each Stockholder hereby agrees that,
during the period of duration (not to exceed one-hundred eighty (180) days)
specified by the Company and an underwriter of Common Stock or other securities
of the Company following the effective date of the Company's registration
statement in connection with the Company's first Qualified Public Offering, the
Stockholder shall not, to the extent requested by the Company or such
underwriter, directly or indirectly sell, contract to sell (including, without
limitation, any short sale), grant any option to purchase or

                                      24
<PAGE>

otherwise transfer or dispose of (other than to donees who agree to be similarly
bound) any securities of the Company held by such Stockholder, except Common
Stock or other securities included in such registration; provided that all
officers, directors and holders of 1% or greater of the Company's Common Stock
agree to similar provisions and such provisions are in full force and effect and
are not waived in any respect or have been waived ratably with respect to each
holder. In order to enforce the foregoing covenant, the Company may impose stop-
transfer instructions with respect to such securities of each such Investor (and
the shares or securities of every other person subject to the foregoing
restriction) until the end of such period. This covenant shall survive
termination of this Agreement.

     7.3   Successors and Assigns. Except as otherwise expressly provided
herein, the provisions hereof shall inure to the benefit of, and be binding
upon, the successors, assigns, heirs, executors and administrators of the
parties hereto; provided, however, that such assignee, heir, executor or
administrator of the parties hereto shall then execute a counterpart to this
Agreement.

     7.4   Entire Agreement: Amendment and Waiver. This Agreement and the
Purchase Agreement supersede any other agreement, whether written or oral, that
may have been made or entered into by the parties hereto relating to the matters
contemplated hereby and constitute the full and entire understanding and
agreement between the parties with regard to the subjects hereof. In particular,
the execution of this Agreement amends and replaces in its entirety that certain
Stockholders' Agreement dated as of May 28th, 1998, as amended, by and between
the Company and certain of the Investors. Neither this Agreement nor any term
hereof may be amended, waived, discharged or terminated except by a written
instrument signed by the Company and the holders of at least 66 2/3% of the
outstanding Investor Stock, including at least 66 2/3% of the outstanding Series
D Preferred Stock, and any such amendment, waiver, discharge or termination
shall be binding on all the Stockholders; provided however, that no amendment or
waiver which adversely affects the interests of one Investor without a similar
and proportionate effect on the interests of all Investors may be made without
the consent of the Investor whose interests are so adversely affected; provided,
further, that any amendment or waiver which solely adversely affects the rights
of the holders of either the Management Stock or the Series A Preferred Stock,
respectively, shall require the written consent of a majority of the Holders of
Management Stock or the Series A Preferred Stock, respectively.

     7.5   Notices, Etc. All notices and other communications required or
permitted hereunder shall be in writing and shall be deemed effectively given:
(i) upon personal delivery to the party to be notified, (ii) when sent by
confirmed telex or facsimile if sent during normal business hours of the
recipient, if not, then on the next business day, (iii) five (5) days after
having been sent by registered or certified mail, return receipt

                                      25
<PAGE>

requested, postage prepaid, or (iv) one (1) day after deposit with a nationally
recognized overnight courier, special next day delivery, with verification of
receipt. All communications shall be sent to the Company at 5777 Central Avenue,
Suite 120, Boulder, Colorado 80301 and to a Stockholder at the address reflected
in the Company's stock ledger or at such other address as such Stockholder shall
have furnished to the Company in writing.

     7.6   Delays or Omissions.  No delay or omission to exercise any right,
power or remedy accruing to any Stockholder under this Agreement shall impair
any such right, power or remedy of such Stockholder nor shall it be construed to
be a waiver of any such breach or default, or an acquiescence therein, or of or
in any similar breach or default thereafter occurring; nor shall any waiver of
any single breach or default be deemed a waiver of any other breach or default
theretofore or thereafter occurring.  Any waiver, permit, consent or approval of
any kind or character on the part of any Stockholder of any breach or default
under this Agreement or any waiver on the part of any Stockholder of any
provisions or conditions of this Agreement must be made in writing and shall be
effective only to the extent specifically set forth in such writing.  All
remedies, either under this Agreement or by law or otherwise afforded to any
Stockholder, shall be cumulative and not alternative.

     7.7   Severability. Unless otherwise expressly provided herein, a
Stockholder's rights hereunder are several rights, not rights jointly held with
any of the other Stockholders. In case any provision of the Agreement shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

     7.8   Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.

     7.9   Termination. The provisions of this Agreement (other than Article II
hereof) shall terminate upon the earlier to occur of (i) consummation of a
Qualified Public Offering or (ii) a Sale of the Company. The provisions of
Article II shall terminate on the tenth anniversary of the date hereof.

     7.10  Specific Enforcement. Any holder of Investor Stock shall be entitled
to specific enforcement of its rights under this Agreement. The parties
acknowledge that money damages would be an inadequate remedy for a breach of
this Agreement and consent to an action for specific performance or other
injunctive relief in the event of any such breach.

     7.11  Confidentiality and Non-Disclosure

                                      26
<PAGE>

           (a)   Disclosure of Terms. The terms and conditions of this Agreement
and the Transaction Documents (collectively, the "Financing Terms"), including
their existence, shall be considered confidential information and shall not be
disclosed by any party hereto to any third party except in accordance with the
provisions set forth below.

           (b)   Press Releases, Etc. Neither the Investors nor the Company
shall issue any press release or make any public disclosure regarding the
transactions contemplated hereby unless such press release or public disclosure
is approved by those parties mentioned in such press release or public
disclosure in advance. Notwithstanding the foregoing and subject to subsection
(d) below, each of the parties hereto may, in documents required to be filed by
it with the SEC or other regulatory bodies, make such statements with respect to
the transactions contemplated hereby as each may be advised by counsel is
legally necessary or advisable, and may make such disclosure as it is advised by
its counsel is required by law. Within sixty (60) days of the first closing of
the transaction contemplated by the Financing Terms in which Intel has
participated, the Company may issue a press release in the form provided by
Intel disclosing that Intel has invested in the Company; provided that (i) the
release does not disclose any of the Financing Terms, (ii) the release does not
disclose the amount invested specifically by Intel and (iii) the final form of
the press release is approved in advance in writing by Intel. Intel's name and
the fact that Intel is an investor in the Company can be included in a reusable
press release boilerplate statement, so long as Intel has given the Company its
initial approval of such boilerplate statement and the boilerplate statement is
reproduced in exactly the form in which it was approved. No other announcement
regarding Intel in a press release, conference, advertisement, announcement,
professional or trade publication, mass marketing materials or otherwise to the
general public may be made without Intel's prior written consent. No
announcement regarding Excite in a press release, conference, advertisement,
announcement, professional or trade publication, mass marketing materials or
otherwise to the general public may be made without Excite's prior written
consent.

           (c)   Permitted Disclosures. Notwithstanding the foregoing, (i) any
party may disclose any of the Financing Terms to its current or bona fide
prospective investors, employees, investment bankers, lenders, accountants and
attorneys, in each case only where such persons or entities are under
appropriate nondisclosure obligations, (ii) any party may disclose (other than
in a press release or other public announcement described in subsection (b))
solely the fact that the Investors are investors in the Company to any third
parties without the requirement for the consent of any other party or
nondisclosure obligations, (iii) Intel may disclose its investment in the
Company and the related Financing Terms to third parties or the public at its
sole discretion and (iv) Centennial may disclose the Financing Terms to any of
its or their Affiliates

                                      27
<PAGE>

           (d)   Legally Compelled Disclosure. In the event that any party is
requested or becomes legally compelled (including without limitation, pursuant
to securities laws and regulations) to disclose the existence of this Agreement,
the Stock Purchase Agreement, the Rights Agreement or any of the Financing Terms
hereof in contravention of the provisions of this Section 7.11, such party (the
"Disclosing Party") shall provide the other parties (the "Non-Disclosing
Parties") with prompt written notice of that fact so that the appropriate party
may seek (with the cooperation and reasonable efforts of the other parties) a
protective order, confidential treatment or other appropriate remedy. In such
event, the Disclosing Party shall furnish only that portion of the information
which is legally required and shall exercise reasonable efforts to obtain
reliable assurance that confidential treatment will be accorded such information
to the extent reasonably requested by any Non-Disclosing Party.

           (e)   Other Information. The provisions of this Section 7.11 shall be
in addition to, and not in substitution for, the provisions of any separate
nondisclosure agreement executed by any of the parties hereto with respect to
the transactions contemplated hereby. Additional disclosures and exchange of
confidential information between the Company and Intel (including without
limitation, any exchanges of information with any Intel Observer) shall be
governed by the terms of the Corporate Non-Disclosure Agreement No. 2087874,
dated March 23, 1999, executed by the Company and Intel, and any Confidential
Information Transmittal Records ("CITR") provided in connection therewith.

           (f)   All notices required under this section shall be made pursuant
to Section 7.5 of this Agreement.

                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK.]

                                      28
<PAGE>

     In Witness Whereof, the parties hereto have executed this Stockholders
Agreement effective as of the day and year first above written.

                                     COMPANY:

                                     VStream Incorporated

                                     By: /s/
                                        -----------------------------------
                                     Title:
                                           --------------------------------

                                     PURCHASERS

                                     Centennial Fund V, L.P.

                                     By:  Centennial Holdings V, L.P.,
                                          Its General Partner

                                     By: /s/
                                        -----------------------------------
                                     a General Partner

                                     Centennial Fund VI, L.P.

                                     By:  Centennial Holdings VI, LLC
                                          Its General Partner

                                     By: /s/
                                        -----------------------------------
                                              Managing Principal

                                     [Signature Page to Stockholders' Agreement]

                                      29
<PAGE>

                                     Centennial Entrepreneurs Fund VI, L.P.

                                     By:  Centennial Holdings VI, LLC.
                                          Its General Partner

                                     By: /s/
                                        ----------------------------------------
                                             Managing Principal

                                     Centennial Holdings I, LLC

                                     By: /s/
                                        ----------------------------------------
                                     Its
                                        ----------------------------------------

                                     By:
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------
                                     Softbank Technology Ventures IV, L.P.

                                     By:  STV IV LLC

                                     By: /s/
                                        ----------------------------------------
                                             Managing Director

                                     Softbank Technology Advisors Fund, L.P.

                                     By:  STV IV LLC

                                     By: /s/
                                        ----------------------------------------
                                             Managing Director

                                     Matsushita Electric Industrial Co., LTD

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     [Signature Page to Stockholders' Agreement]

                                      30
<PAGE>

                                     Highland Capital Partners III Limited
                                     Partnership

                                     By:  Highland Management Partners III
                                     Limited Partnership
                                     Its General Partner

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Highland Entrepreneurs' Fund III Limited
                                     Partnership

                                     By:  HEF III, LLC
                                     Its General Partner

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Intel Corporation

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Excite, Inc.

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Nexus Capital Partners II, L.P.

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     [Signature Page to Stockholders' Agreement]

                                      31
<PAGE>

                                     Porcelain Partners, L.P.

                                     By: /s/
                                        ----------------------------------------
                                     Its General Partner

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     GE Capital Equity Investments, Inc.

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Asdale, Ltd.

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Millennial Holdings, LLC

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Whitko & Company

                                     By: /s/
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Pequot Private Equity Fund II,  L.P.

                                     By:  Pequot Capital Management, Inc.
                                     Its Investment Manager

                                     By: /s/
                                        ----------------------------------------
                                        David Malat, Chief Financial Officer

                                     [Signature Page to Stockholders' Agreement]

                                      32
<PAGE>

                                      Vivendi

                                      By: /s/
                                         ---------------------------------------
                                      Title:
                                            ------------------------------------

                                      EMC Corporation

                                      By: /s/
                                         ---------------------------------------
                                      Title:
                                            ------------------------------------

                                      /s/ Paul Berberian
                                      ------------------------------------------
                                      Paul Berberian

                                      /s/ Jim Le Jeal
                                      ------------------------------------------
                                      Jim Le Jeal

                                      /s/ Todd Vernon
                                      ------------------------------------------
                                      Todd Vernon

                                      [Signature Page to Stockholders Agreement]

                                      33

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