Document:

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                                                                    EXHIBIT 10.9

                          ORATEC INTERVENTIONS, INC.

                 1999 DIRECTORS' STOCK OPTION PLAN, AS AMENDED
                 ---------------------------------------------

     1.  Purposes of the Plan.  The purposes of this Directors' Stock Option
         --------------------
Plan are to attract and retain the best available individuals for service as
Directors of the Company, to provide additional incentive to the Outside
Directors of the Company to serve as Directors, and to encourage their continued
service on the Board.

         All options granted hereunder shall be nonstatutory stock options.

     2.  Definitions.  As used herein, the following definitions shall apply:
         -----------

         (a) "Board" means the Board of Directors of the Company.
               -----

         (b) "Change of Control" means a sale of all or substantially all of
              -----------------
the Company's assets, or any merger or consolidation of the Company with or into
another corporation other than a merger or consolidation in which the holders of
more than 50% of the shares of capital stock of the Company outstanding
immediately prior to such transaction continue to hold (either by the voting
securities remaining outstanding or by their being converted into voting
securities of the surviving entity) more than 50% of the total voting power
represented by the voting securities of the Company, or such surviving entity,
outstanding immediately after such transaction.

         (c) "Code" means the Internal Revenue Code of 1986, as amended.
              ----

         (d) "Common Stock" means the Common Stock of the Company.
              ------------

         (e) "Company" means ORATEC Interventions, Inc., a Delaware corporation.
              -------

         (f) "Continuous Status as a Director" means the absence of any
              -------------------------------
interruption or termination of service as a Director.

         (g) "Corporate Transaction" means a dissolution or liquidation of the
              ---------------------
Company, a sale of all or substantially all of the Company's assets, or a
merger, consolidation or other capital reorganization of the Company with or
into another corporation.

         (h) "Director" means a member of the Board.
              --------

         (i) "Employee" means any person, including any officer or Director,
              --------
employed by the Company or any Parent or Subsidiary of the Company.  The payment
of a

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director's fee by the Company shall not be sufficient in and of itself to
constitute "employment" by the Company.

         (j) "Exchange Act" means the Securities Exchange Act of 1934, as
              ------------
amended.

         (k) "Option" means a stock option granted pursuant to the Plan.  All
              ------
options shall be nonstatutory stock options (i.e., options that are not intended
to qualify as incentive stock options under Section 422 of the Code).

         (l) "Optioned Stock" means the Common Stock subject to an Option.
              --------------

         (m) "Optionee" means an Outside Director who receives an Option.
              --------

         (n) "Outside Director" means a Director who is not an Employee.
              ----------------

         (o) "Parent" means a "parent corporation," whether now or hereafter
              ------
existing, as defined in Section 424(e) of the Code.

         (p) "Plan" means this 1999 Directors' Stock Option Plan.
               ----

         (q) "Share" means a share of the Common Stock, as adjusted in
              -----
accordance with Section 11 of the Plan.

         (r) "Subsidiary" means a "subsidiary corporation," whether now or
              ----------
hereafter existing, as defined in Section 424(f) of the Code.

         3.  Stock Subject to the Plan.  Subject to the provisions of Section
             -------------------------
11 of the Plan, the maximum aggregate number of Shares which may be optioned and
sold under the Plan is 250,000 Shares of Common Stock (the "Pool").  The Shares
                                                            ----
may be authorized, but unissued, or reacquired Common Stock.

         If an Option should expire or become unexercisable for any reason
without having been exercised in full, the unpurchased Shares which were subject
thereto shall, unless the Plan has been terminated, become available for future
grant under the Plan. In addition, any Shares of Common Stock that are retained
by the Company upon exercise of an Option in order to satisfy the exercise price
for such Option, or any withholding taxes due with respect to such exercise,
shall be treated as not issued and shall continue to be available under the
Plan. If Shares that were acquired upon exercise of an Option are subsequently
repurchased by the Company, such Shares shall not in any event be returned to
the Plan and shall not become available for future grant under the Plan.

         4.  Administration of and Grants of Options under the Plan.
             ------------------------------------------------------

             (a) Administrator.  Except as otherwise required herein, the Plan
                 -------------
shall be administered by the Board.

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             (b) Procedure for Grants.  All grants of Options hereunder shall be
                 --------------------
automatic and nondiscretionary and shall be made strictly in accordance with the
following provisions:

                 (i)    No person shall have any discretion to select which
Outside Directors shall be granted Options or to determine the number of Shares
to be covered by Options granted to Outside Directors.

                 (ii)   Each Outside Director shall be automatically granted an
Option to purchase 30,000 Shares (the "First Option") on the date on which such
person first becomes an Outside Director after the effective date of this Plan,
whether through election by the shareholders of the Company or appointment by
the Board of Directors to fill a vacancy.

                 (iii)  Each Outside Director, including an Outside Director who
did not receive a First Option grant, shall be automatically granted an Option
to purchase 10,000 Shares (the "Subsequent Option") on the date of each Annual
Meeting of the Company's stockholders immediately following which such Outside
Director is serving on the Board, provided that, on such date, he or she shall
have served on the Board for at least six (6) months prior to the date of such
Annual Meeting.

                 (iv)   Notwithstanding the provisions of subsections (ii) and
(iii) hereof, in the event that a grant would cause the number of Shares subject
to outstanding Options plus the number of Shares previously purchased upon
exercise of Options to exceed the Pool, then each such automatic grant shall be
for that number of Shares determined by dividing the total number of Shares
remaining available for grant by the number of Outside Directors receiving an
Option on the automatic grant date. Any further grants shall then be deferred
until such time, if any, as additional Shares become available for grant under
the Plan through action of the stockholders to increase the number of Shares
which may be issued under the Plan or through cancellation or expiration of
Options previously granted hereunder.

                 (v)    Notwithstanding the provisions of subsections (ii) and
(iii) hereof, any grant of an Option made before the Company has obtained
stockholder approval of the Plan in accordance with Section 17 hereof shall be
conditioned upon obtaining such stockholder approval of the Plan in accordance
with Section 17 hereof.

                 (vi)   The terms of each First Option granted hereunder shall
be as follows:

                         (1)  each First Option shall be exercisable only while
the Outside Director remains a Director of the Company, except as set forth in
Section 9 below;

                         (2)  the exercise price per Share shall be 100% of the
fair market value per Share on the date of grant of each First Option,
determined in accordance with Section 8 hereof;

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                         (3)  each First Option shall vest and become
exercisable at the rate of 1/36 of the Shares subject to the First Option on
each monthly anniversary following the date of grant.

               (vii)     The terms of each Subsequent Option granted hereunder
shall be as follows:

                         (1)  each Subsequent Option shall be exercisable only
while the Outside Director remains a Director of the Company, except as set
forth in Section 9 below;

                         (2)  the exercise price per Share shall be 100% of the
fair market value per Share on the date of grant of each Subsequent Option,
determined in accordance with Section 8 hereof;

                         (3)  each Subsequent Option shall vest and become
exercisable at the rate of 1/12 of the Shares subject to the Subsequent Option
on each monthly anniversary following the date of grant.

          (c) Powers of the Board.  Subject to the provisions and restrictions
              -------------------
of the Plan, the Board shall have the authority, in its discretion:  (i) to
determine, upon review of relevant information and in accordance with Section
8(b) of the Plan, the fair market value of the Common Stock; (ii) to determine
the exercise price per Share of Options to be granted, which exercise price
shall be determined in accordance with Section 8 of the Plan; (iii) to interpret
the Plan; (iv) to prescribe, amend and rescind rules and regulations relating to
the Plan; (v) to authorize any person to execute on behalf of the Company any
instrument required to effectuate the grant of an Option previously granted
hereunder; and (vi) to make all other determinations deemed necessary or
advisable for the administration of the Plan.

          (d) Effect of Board's Decision.  All decisions, determinations and
              --------------------------
interpretations of the Board shall be final and binding on all Optionees and any
other holders of any Options granted under the Plan.

          (e) Suspension or Termination of Option.  If the Chief Executive
              -----------------------------------
Officer or his or her designee reasonably believes that an Optionee has
committed an act of misconduct, such officer may suspend the Optionee's right to
exercise any option pending a determination by the Board (excluding the Outside
Director accused of such misconduct). If the Board (excluding the Outside
Director accused of such misconduct) determines an Optionee has committed an act
of embezzlement, fraud, dishonesty, nonpayment of an obligation owed to the
Company, breach of fiduciary duty or deliberate disregard of the Company rules
resulting in loss, damage or injury to the Company, or if an Optionee makes an
unauthorized disclosure of any Company trade secret or confidential information,
engages in any conduct constituting unfair competition, induces any Company
customer to breach a contract with the Company or induces any principal for whom
the Company acts as agent to terminate such agency relationship, neither the
Optionee nor his or her estate shall be entitled to exercise any Option
whatsoever. In making such determination, the Board of Directors (excluding the
Outside Director accused of such misconduct) shall act fairly and shall give the
Optionee an opportunity to appear and present evidence on Optionee's behalf at a
hearing before the Board or a committee of the Board.

                                      -4-
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     5.   Eligibility.  Options may be granted only to Outside Directors.  All
          -----------
Options shall be automatically granted in accordance with the terms set forth in
Section 4(b) above. An Outside Director, who has been granted an Option may, if
he or she is otherwise eligible, be granted an additional Option or Options in
accordance with such provisions.

          The Plan shall not confer upon any Optionee any right with respect to
continuation of service as a Director or nomination to serve as a Director, nor
shall it interfere in any way with any rights which the Director or the Company
may have to terminate his or her directorship at any time.

     6.   Term of Plan; Effective Date.  The Plan shall become effective on the
          ----------------------------
effectiveness of the registration statement under the Securities Act of 1933, as
amended, relating to the Company's initial public offering of securities.  It
shall continue in effect for a term of ten (10) years unless sooner terminated
under Section 13 of the Plan.

     7.   Term of Options.  The term of each Option shall be ten (10) years from
          ---------------
the date of grant thereof unless an Option terminates sooner pursuant to Section
9 below.

     8.   Exercise Price and Consideration.
          --------------------------------

          (a) Exercise Price.  The per Share exercise price for the Shares to be
              --------------
issued pursuant to exercise of an Option shall be 100% of the fair market value
per Share on the date of grant of the Option.

          (b) Fair Market Value.  The fair market value shall be determined by
              -----------------
the Board; provided however that in the event the Common Stock is traded on the
Nasdaq National Market or listed on a stock exchange, the fair market value per
Share shall be the closing sales price on such system or exchange on the date of
grant of the Option (or, in the event that the Common Stock is not traded on
such date, on the immediately preceding trading date), as reported in The Wall
                                                                      --------
Street Journal, or if there is a public market for the Common Stock but the
--------------
Common Stock is not traded on the Nasdaq National Market or listed on a stock
exchange, the fair market value per Share shall be the mean of the bid and asked
prices of the Common Stock in the over-the-counter market on the date of grant,
as reported in The Wall Street Journal (or, if not so reported, as otherwise
               ------------------------
reported by the National Association of Securities Dealers Automated Quotation
("Nasdaq") System).

          (c) Form of Consideration.  The consideration to be paid for the
              ---------------------
Shares to be issued upon exercise of an Option shall consist entirely of cash,
check, other Shares of Common Stock having a fair market value on the date of
surrender equal to the aggregate exercise price of the Shares as to which the
Option shall be exercised (which, if acquired from the Company, shall have been
held for at least six months), or any combination of such methods of payment
and/or any other consideration or method of payment as shall be permitted under
applicable corporate law.

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     9.   Exercise of Option.
          ------------------

          (a) Procedure for Exercise; Rights as a Stockholder.  Any Option
              -----------------------------------------------
granted hereunder shall be exercisable at such times as are set forth in Section
4(b) above; provided however that no Options shall be exercisable prior to
stockholder approval of the Plan in accordance with Section 17 below has been
obtained.

              An Option may not be exercised for a fraction of a Share.

              An Option shall be deemed to be exercised when written notice of
such exercise has been given to the Company in accordance with the terms of the
Option by the person entitled to exercise the Option and full payment for the
Shares with respect to which the Option is exercised has been received by the
Company. Full payment may consist of any consideration and method of payment
allowable under Section 8(c) of the Plan. Until the issuance (as evidenced by
the appropriate entry on the books of the Company or of a duly authorized
transfer agent of the Company) of the stock certificate evidencing such Shares,
no right to vote or receive dividends or any other rights as a stockholder shall
exist with respect to the Optioned Stock, notwithstanding the exercise of the
Option. A share certificate for the number of Shares so acquired shall be issued
to the Optionee as soon as practicable after exercise of the Option. No
adjustment will be made for a dividend or other right for which the record date
is prior to the date the stock certificate is issued, except as provided in
Section 11 of the Plan.

              Exercise of an Option in any manner shall result in a decrease in
the number of Shares which thereafter may be available, both for purposes of the
Plan and for sale under the Option, by the number of Shares as to which the
Option is exercised.

          (b) Termination of Continuous Status as a Director.  If an Outside
              ----------------------------------------------
Director ceases to serve as a Director, he or she may, but only within sixty
(60) days after the date he or she ceases to be a Director of the Company,
exercise his or her Option to the extent that he or she was entitled to exercise
it at the date of such termination. Notwithstanding the foregoing, in no event
may the Option be exercised after its term set forth in Section 7 has expired.
To the extent that such Outside Director was not entitled to exercise an Option
at the date of such termination, or does not exercise such Option (to the extent
he or she was entitled to exercise) within the time specified above, the Option
shall terminate and the Shares underlying the unexercised portion of the Option
shall revert to the Plan.

          (c) Disability of Optionee.  Notwithstanding Section 9(b) above, in
              ----------------------
the event a Director is unable to continue his or her service as a Director with
the Company as a result of his or her total and permanent disability (as defined
in Section 22(e)(3) of the Code), he or she may, but only within twelve (12)
months from the date of such termination, exercise his or her Option to the
extent he or she was entitled to exercise it at the date of such termination.
Notwithstanding the foregoing, in no event may the Option be exercised after its
term set forth in Section 7 has expired. To the extent that he or she was not
entitled to exercise the Option at the date of termination, or if he or she does
not exercise such Option (to the extent he or she was entitled to exercise)
within the time specified above, the Option shall terminate and the Shares
underlying the unexercised portion of the Option shall revert to the Plan.

                                      -6-
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          (d) Death of Optionee.  In the event of the death of an Optionee: (A)
              -----------------
during the term of the Option who is, at the time of his or her death, a
Director of the Company and who shall have been in Continuous Status as a
Director since the date of grant of the Option, or (B) within three (3) months
after the termination of Continuous Status as a Director, the Option may be
exercised, at any time within twelve (12) months following the date of death, by
the Optionee's estate or by a person who acquired the right to exercise the
Option by bequest or inheritance, but only to the extent of the right to
exercise that had accrued at the date of death or the date of termination, as
applicable. Notwithstanding the foregoing, in no event may the Option be
exercised after its term set forth in Section 7 has expired. To the extent that
an Optionee was not entitled to exercise the Option at the date of death or
termination or if he or she does not exercise such Option (to the extent he or
she was entitled to exercise) within the time specified above, the Option shall
terminate and the Shares underlying the unexercised portion of the Option shall
revert to the Plan.

     10.  Nontransferability of Options.  The Option may not be sold, pledged,
          -----------------------------
assigned, hypothecated, transferred or disposed of in any manner other than by
will or by the laws of descent or distribution or pursuant to a qualified
domestic relations order (as defined by the Code or the rules thereunder). The
designation of a beneficiary by an Optionee does not constitute a transfer. An
Option may be exercised during the lifetime of an Optionee only by the Optionee
or a transferee permitted by this Section.

     11.  Adjustments Upon Changes in Capitalization; Corporate Transactions.
          ------------------------------------------------------------------

          (a) Adjustment.  Subject to any required action by the shareholders of
              ----------
the Company, the number of shares of Common Stock covered by each outstanding
Option, the number of Shares of Common Stock set forth in Sections 4(b)(ii) and
(iii) above, and the number of Shares of Common Stock which have been authorized
for issuance under the Plan but as to which no Options have yet been granted or
which have been returned to the Plan upon cancellation or expiration of an
Option, as well as the price per Share of Common Stock covered by each such
outstanding Option, shall be proportionately adjusted for any increase or
decrease in the number of issued Shares of Common Stock resulting from a stock
split, reverse stock split, stock dividend, combination or reclassification of
the Common Stock (including any such change in the number of Shares of Common
Stock effected in connection with a change in domicile of the Company) or any
other increase or decrease in the number of issued Shares of Common Stock
effected without receipt of consideration by the Company; provided however that
conversion of any convertible securities of the Company shall not be deemed to
have been "effected without receipt of consideration." Such adjustment shall be
made by the Board, whose determination in that respect shall be final, binding
and conclusive. Except as expressly provided herein, no issuance by the Company
of shares of stock of any class, or securities convertible into shares of stock
of any class, shall affect, and no adjustment by reason thereof shall be made
with respect to, the number or price of shares of Common Stock subject to an
Option.

          (b) Corporate Transactions; Change of Control.  In the event of a
              -----------------------------------------
Corporate Transaction, including a Change of Control, and except as otherwise
provided in a Stock Option Agreement issued under the Plan, each outstanding
Option shall be assumed or an

                                      -7-
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equivalent option shall be substituted by the successor corporation or a Parent
or Subsidiary of such successor corporation, unless the successor corporation
does not agree to assume the outstanding Options or to substitute equivalent
options, in which case the Options shall terminate upon the consummation of the
transaction.

          For purposes of this Section 11(b), an Option shall be considered
assumed, without limitation, if, at the time of issuance of the stock or other
consideration upon such Corporate Transaction or Change of Control, each
Optionee would be entitled to receive upon exercise of an Option the same number
and kind of shares of stock or the same amount of property, cash or securities
as the Optionee would have been entitled to receive upon the occurrence of such
transaction if the Optionee had been, immediately prior to such transaction, the
holder of the number of Shares of Common Stock covered by the Option at such
time (after giving effect to any adjustments in the number of Shares covered by
the Option as provided for in this Section 11); provided however that if such
consideration received in the transaction was not solely common stock of the
successor corporation or its Parent, the Administrator may, with the consent of
the successor corporation, provide for the consideration to be received upon
exercise of the Option to be solely common stock of the successor corporation or
its Parent equal to the Fair Market Value of the per Share consideration
received by holders of Common Stock in the transaction.

          (c) Certain Distributions.  In the event of any distribution to the
              ---------------------
Company's stockholders of securities of any other entity or other assets (other
than dividends payable in cash or stock of the Company) without receipt of
consideration by the Company, the Administrator may, in its discretion,
appropriately adjust the price per Share of Common Stock covered by each
outstanding Option to reflect the effect of such distribution.

     12.  Time of Granting Options.  The date of grant of an Option shall, for
          ------------------------
all purposes, be the date determined in accordance with Section 4(b) hereof.
Notice of the determination shall be given to each Outside Director to whom an
Option is so granted within a reasonable time after the date of such grant.

     13.  Amendment and Termination of the Plan.
          -------------------------------------

          (a) Amendment and Termination.  The Board may amend or terminate the
              -------------------------
Plan from time to time in such respects as the Board may deem advisable;
provided that, to the extent necessary and desirable to comply with Rule 16b-3
under the Exchange Act (or any other applicable law or regulation), the Company
shall obtain approval of the stockholders of the Company to Plan amendments to
the extent and in the manner required by such law or regulation.

          (b) Effect of Amendment or Termination.  Any such amendment or
              ----------------------------------
termination of the Plan that would impair the rights of any Optionee shall not
affect Options already granted to such Optionee and such Options shall remain in
full force and effect as if this Plan had not been amended or terminated, unless
mutually agreed otherwise between the Optionee and the Board, which agreement
must be in writing and signed by the Optionee and the Company.

                                      -8-
<PAGE>

     14.  Conditions Upon Issuance of Shares.  Notwithstanding any other
          ----------------------------------
provision of the Plan or any agreement entered into by the Company pursuant to
the Plan, the Company shall not be obligated, and shall have no liability for
failure, to issue or deliver any Shares under the Plan unless such issuance or
delivery would comply with the legal requirements relating to the administration
of stock option plans under applicable U.S. state corporate laws, U.S. federal
and applicable state securities laws, the Code, any stock exchange or Nasdaq
rules or regulations to which the Company may be subject and the applicable laws
of any other country or jurisdiction where Options are granted under the Plan,
as such laws, rules, regulations and requirements shall be in place from time to
time (the "Applicable Laws"). Such compliance shall be determined by the Company
           ---------------
in consultation with its legal counsel.

          As a condition to the exercise of an Option, the Company may require
the person exercising such Option to represent and warrant at the time of any
such exercise that the Shares are being purchased only for investment and
without any present intention to sell or distribute such Shares if, in the
opinion of counsel for the Company, such a representation is required by law.

     15.  Reservation of Shares.  The Company, during the term of this Plan,
          ---------------------
will at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

     16.  Option Agreement.  Options shall be evidenced by written option
          ----------------
agreements in such form as the Board shall approve.

     17.  Stockholder Approval.  If required by the Applicable Laws, continuance
          --------------------
of the Plan shall be subject to approval by the stockholders of the Company.
Such stockholder approval shall be obtained in the manner and to the degree
required under the Applicable Laws.

                                      -9-

<PAGE>

                          ORATEC INTERVENTIONS, INC.

                       1999 DIRECTORS' STOCK OPTION PLAN

                         NOTICE OF STOCK OPTION GRANT
                         ----------------------------

(Optionee)
(OptioneeAddress1)
(OptioneeAddress2)

     You have been granted an option to purchase Common Stock of ORATEC
Interventions, Inc. (the "Company") as follows:
                          -------

     Date of Grant                       (GrantDate)

     Vesting Commencement Date           (VestingStartDate)

     Exercise Price per Share            (ExercisePrice)

     Total Number of Shares Granted      (SharesGranted)

     Total Exercise Price                (TotalExercisePrice)

     Expiration Date                     (ExpirDate)

     Vesting Schedule:                    This Option may be exercised, in
     ----------------
                                          part, in accordance with the following
                                          schedule: [1/36 or 1/12] of the Option
                                          Shares shall vest and become
                                          exercisable on each monthly
                                          anniversary following the Date of
                                          Grant.

     Termination Period:                  This Option may be exercised for 60
     ------------------
                                          days after termination of Optionee's
                                          Continuous Status as a Director, or
                                          such longer period as may be
                                          applicable upon death or Disability of
                                          Optionee as provided in the Plan, but
                                          in no event later than the Expiration
                                          Date as provided above.

                                     -10-

<PAGE>

     By your signature and the signature of the Company's representative below,
you and the Company agree that this option is granted under and governed by the
terms and conditions of the 1999 Directors' Stock Option Plan and the
Nonstatutory Stock Option Agreement, all of which are attached and made a part
of this document.

OPTIONEE:                           ORATEC INTERVENTIONS, INC.

______________________________      By:______________________________
Signature

_____________________________       Title:__________________________
Print Name

                                     -11-

<PAGE>

                          ORATEC INTERVENTIONS, INC.

                      NONSTATUTORY STOCK OPTION AGREEMENT
                      -----------------------------------

     1.   Grant of Option.  The Board of Directors of the Company hereby grants
          ---------------
to the Optionee named in the Notice of Stock Option Grant attached as Part I of
this Agreement (the "Optionee"), an option (the "Option") to purchase a number
                     --------                    ------
of Shares, as set forth in the Notice of Stock Option Grant, at the exercise
price per share set forth in the Notice of Stock Option Grant (the "Exercise
                                                                    --------
Price"'), subject to the terms and conditions of the 1999 Directors' Stock
-----
Option Plan (the "Plan"), which is incorporated herein by reference.
                  ----
(Capitalized terms not defined herein shall have the meanings ascribed to such
terms in the Plan.) In the event of a conflict between the terms and conditions
of the Plan and the terms and conditions of this Nonstatutory Stock Option
Agreement, the terms and conditions of the Plan shall prevail.

     2.   Exercise of Option.
          ------------------

          (a)  Right to Exercise.  This Option is exercisable during its term in
               -----------------
accordance with the Vesting Schedule set out in the Notice of Stock Option Grant
and the applicable provisions of the Plan and this Nonstatutory Stock Option
Agreement. In the event of Optionee's death, disability or other termination of
Optionee's employment or consulting relationship, the exercisability of the
Option is governed by the applicable provisions of the Plan and this
Nonstatutory Stock Option Agreement.

          (b)  Method of Exercise.  This Option is exercisable by delivery of an
               ------------------
exercise notice, in the form attached as Exhibit A (the "Exercise Notice"),
                                         ---------       ---------------
which shall state the election to exercise the Option, the number of Shares in
respect of which the Option is being exercised (the "Exercised Shares"), and
                                                     ----------------
such other representations and agreements as may be required by the Company
pursuant to the provisions of the Plan. The Exercise Notice shall be signed by
the Optionee and shall be delivered in person or by certified mail to the
Secretary of the Company. The Exercise Notice shall be accompanied by payment of
the aggregate Exercise Price as to all Exercised Shares. This Option shall be
deemed to be exercised upon receipt by the Company of such fully executed
Exercise Notice accompanied by such aggregate Exercise Price.

          No Shares shall be issued pursuant to the exercise of this Option
unless such issuance and exercise complies with all relevant provisions of law
and the requirements of any stock exchange or quotation service upon which the
Shares are then listed. Assuming such compliance, for income tax purposes the
Exercised Shares shall be considered transferred to the Optionee on the date the
Option is exercised with respect to such Exercised Shares.

     3.   Method of Payment.  Payment of the aggregate Exercise Price shall be
          -----------------
by any of the following or a combination thereof, at the election of the
Optionee:

          (a)  cash;

                                     -12-

<PAGE>

          (b)  check;

          (c)  delivery of a properly executed exercise notice together with
such other documentation as the Administrator and the broker, if applicable,
shall require to effect an exercise of the Option and delivery to the Company of
the sale or loan proceeds required to pay the exercise price; or

          (d)  surrender of other Shares which (i) in the case of Shares
acquired upon exercise of an option, have been owned by the Optionee for more
than six (6) months on the date of surrender, and (ii) have a Fair Market Value
on the date of surrender equal to the aggregate Exercise Price of the Exercised
Shares.

     4.   Non-Transferability of Option.  This Option may not be transferred in
          -----------------------------
any manner otherwise than by will or by the laws of descent or distribution or
pursuant to a domestic relations order (as defined by the Code or the rules
thereunder) and may be exercised during the lifetime of Optionee only by the
Optionee or a transferee permitted by Section 10 of the Plan. The terms of the
Plan and this Nonstatutory Stock Option Agreement shall be binding upon the
executors, administrators, heirs, successors and assigns of the Optionee.

     5.   Term of Option.  This Option may be exercised only within the term set
          --------------
out in the Notice of Stock Option Grant, and may be exercised during such term
only in accordance with the Plan and the terms of this Nonstatutory Stock Option
Agreement.

     6.   Tax Consequences.  Set forth below is a brief summary of certain
          ----------------
federal tax consequences relating to this Option under the law in effect as of
the date of grant. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND
REGULATIONS ARE SUBJECT TO CHANGE. OPTIONEE SHOULD CONSULT HIS OR HER OWN TAX
ADVISER BEFORE EXERCISING THIS OPTION OR DISPOSING OF THE SHARES.

          (a)  Exercising the Option.  Since this Option does not qualify as an
               ---------------------
incentive stock option under Section 422 of the Code, the Optionee may incur
regular federal income tax liability upon exercise.  The Optionee will be
treated as having received compensation income (taxable at ordinary income tax
rates) equal to the excess, if any, of the fair market value of the Exercised
Shares on the date of exercise over their aggregate Exercise Price.

          (b)  Disposition of Shares.  If the Optionee holds the Option Shares
               ---------------------
for more than one year, gain realized on disposition of the Shares will be
treated as long-term capital gain for federal income tax purposes. The long-term
capital gain will be taxed for federal income tax purposes at a maximum rate of
20 percent. By your signature and the signature of the Company's representative
below, you and the Company agree that this Option is granted under and governed
by the terms and conditions of the Plan and this Nonstatutory Stock Option
Agreement. Optionee has reviewed the Plan and this Nonstatutory Stock Option
Agreement in their entirety, has had an opportunity to obtain the advice of
counsel prior to executing this Nonstatutory Stock Option Agreement and fully
understands all provisions of the Plan and Nonstatutory Stock Option Agreement.
Optionee hereby agrees to accept as binding, conclusive

                                     -13-

<PAGE>

and final all decisions or interpretations of the Administrator upon any
questions relating to the Plan and Nonstatutory Stock Option Agreement.

                                    ORATEC INTERVENTIONS, INC.

___________________________         By:_____________________________
Optionee

                                    Title:__________________________

                                     -14-

<PAGE>

                                   EXHIBIT A

                              NOTICE OF EXERCISE
                              ------------------

To:       ORATEC Interventions, Inc.

Attn:     Stock Option Administrator

Subject:  Notice of Intention to Exercise Stock Option
          --------------------------------------------

     This is official notice that the undersigned ("Optionee") intends to
                                                    --------
exercise Optionee's option to purchase __________ shares of ORATEC
Interventions, Inc. Common Stock, under and pursuant to the Company's 1999
Directors' Stock Option Plan and the Nonstatutory Stock Option Agreement dated
_______________, as follows:

     Grant Number:                         __________________________

     Date of Purchase:                     __________________________

     Number of Shares:                     __________________________

     Purchase Price:                       __________________________

     Method of Payment of
     Purchase Price:                       __________________________

     Social Security No.:                  __________________________

     The shares should be issued as follows:

          Name:      __________________________

          Address:   __________________________

                     __________________________

                     __________________________

          Signed:    __________________________

          Date:      __________________________

                                     -15-<PAGE>
                                                                    Exhibit 10.1

January 15, 2001

Mr. Costa John
1300 Clay Street, Suite 600
Oakland, CA  94612

Re:  Terms of Employment Offer with Mediaplex, Inc.

Dear Costa:

Mediaplex, Inc (the "Company" or "Employer"), is pleased to offer you the
position described below.  This letter sets forth the terms and conditions of
your employment with the Company.  The Employer hereby employs you and you
hereby accept employment by the Employer, upon the terms and conditions set
forth in this Agreement.  Your first day of employment and the employment start
date will be 1 January 2001.

I.  Description of Employment Position and Responsibilities.  You will serve in
the position of Chief Operating Officer.  By executing this agreement, you agree
to assume and discharge such duties and responsibilities as are commensurate
with this position and such other duties and responsibilities that are assigned
to you from time to time by the Company's Board of Directors or Chief Executive
Officer, or their designee.  It is agreed that you will be responsible for the
effective operation of the Company's, including its affiliates, internal
processes, both within and across departments.  During the term of your
employment, you shall devote your full time, skill and attention to your duties
and responsibilities and shall perform them faithfully, diligently and
competently.  In addition, you shall comply with and be bound by the operating
policies, procedures and practices of the Company in effect from time to time
during your employment, except insofar as this Agreement has modified such
operating policies and practices of the Company.

II.  Employment Considerations.

2.1  At-Will Employment.  You acknowledge that your employment with the Company
is for an unspecified duration that constitutes at-will employment, and that
either you or the Company can terminate this relationship at any time, with or
without cause and without notice subject to the provisions of Section 3.3 as
stated herein.

2.2  Employment Eligibility.  Your employment is contingent on your submission
to the Company of satisfactory original documentation to verify your identity
and eligibility for employment in the United States.

III.  Compensation.

3.1  Base Salary.  In consideration of your services, effective 1 January 2001,
you will be paid an annual base salary of $250,000 (Two Hundred Fifty Thousand
Dollars and no Cents), payable no less frequently than on a monthly basis in
accordance with the Company's standard payroll practices.  The Base Salary will
be reviewed by the Board of Directors, the Chief Executive Officer or their
designee not less frequently than annually, and may be adjusted upward but not
downward in the sole discretion of the Board of Directors.

3.2  Incentive Compensation.  In addition to your base salary, you are entitled
to earn up to a fifty percent (50%) bonus for your service as Chief Operating
Officer determined as follows:

  a. Determining Factors.  The bonus will be earned in the amounts set forth
     below upon achievement of certain specific Company milestones set out below
     which are to be renewed each year:

     i.   Budget Achievement Target. Twenty percent (20%) for reducing the net
          loss before tax for the year ended 31 December 2001 to less than the
          net loss before tax for the year ended 31 December 2000.

     ii.  Exceeding Established Budget Expectations. Five percent (5%), ten
          percent (10%), fifteen percent (15%) for reducing the net loss before
          tax for the year ended 31 December 2001 to five percent (5%), ten
          percent (10%), fifteen percent (15%) than the net loss before tax for
          the year ended 31 December 2000.

     iii. Stock Performance-Related Achievement. An additional cash bonus of up
          to fifteen percent (15%) of your Base Salary will be earned in the
          event of the Company's achievement of the following stock-related
          milestones in 2001. This cumulative fifteen percent (15%) bonus is to
          be divided in three five
<PAGE>

          percent (5%) increments as follows in the event the Company's ten day
          weighted average stock price at December 31, 2001 achieves: $10 (5%
          bonus); $15 (5% bonus) and $20 (5% bonus on the end of the year
          average weighted price.

  b. Payment Schedule.  Your bonus pursuant to this Section 3.2 will be
     determined following each calendar year of the Company after the Effective
     Date, and a good faith estimate, if final determination has not yet been
     made, shall be paid on or before the last day of the first month following
     such calendar year, with the remainder by no later than 10 days following
     receipt by the Company of audited financial statements for the Company for
     the preceding year.  The annual budget will be finalized and approved by
     the Board of Directors on or before the commencement of each fiscal year,
     failing which the budget for purposes of calculating the bonus in each year
     will be set at the prior year's operating expenses as a percentage of
     revenues multiplied by the Company's actual revenues in each year.

3.3  Termination for Other Than Cause.  In the event that the Company elects to
terminate you for other than "Cause" (as defined below), or if you are
"Constructively Terminated" (as defined below), you will be you entitled to six
(6) months of paid salary  as cash severance.  This cash severance shall be paid
by the Company, in one lump sum at the time of termination.  You will be
entitled to retain any Company notebook computer (after inspection by the
Company for Company proprietary information), cell phone and related portable
equipment used by you, although you will be fully responsible for any usage and
service charges associated with such equipment effective from the date of your
termination.  You will receive the severance payments and benefits stated herein
if the Employer terminates your employment upon your death or for any reason, or
if you terminate your employment due to constructive termination, provided that
you must first execute a full mutual release of any and all claims against the
Employer which mutual release shall be in a form acceptable to the Employer.

  (i)  Pursuant to this paragraph, the Employer will pay to you: (a) your Base
       Salary for six (6) months following the effective date of the
       termination, if the termination is effective on or before August 1, 2001;
       or (b) your Base Salary for twelve (12) months following the effective
       date of the termination, if the termination is effective on or after
       August 1, 2001 (collectively, the "Severance Payments").

  (ii) In addition, provided that you elect continued coverage under federal
       COBRA law as applicable, the Employer shall pay the full premiums for
       your group health and any life insurance, disability insurance, and other
       Company-provided health and welfare benefits, including coverage for your
       eligible dependents, and shall pay to you an amount equivalent to the
       standard 401 (k) matching contribution paid by the Employer to its
       employees earning the same base salary as your Base Salary in effect on
       the termination date for the time period provided in the preceding
       paragraph; provided, however, that the Company shall pay premiums for
       your eligible dependents only for coverage for which those eligible
       dependents were enrolled immediately prior to the termination date.  No
       premium payments will be made following the effective date of your
       coverage by a health insurance plan of a subsequent employer.  For the
       balance of the period that you are entitled to coverage under federal
       COBRA law, you shall be entitled to maintain such coverage at your own
       expense.

  Termination Not For Cause Or Constructive Termination:  Acceleration Of
Option.  If the Employer terminates your employment without Cause or if you are
"Constructively Terminated" (as defined below), the vesting of your Option shall
be accelerated as provided herein, provided that you and the Employer execute an
effective mutual release of claims substantially in the form attached hereto as
Exhibit A, the final wording of which shall be determined by the Company (the
"Release").  Pursuant to this paragraph, you shall receive accelerated vesting
as follows:

  (a) if the termination of your employment is effective on or before 31 March
      2001, you shall receive acceleration of vesting of fifty-percent (50%) of
      the unvested shares subject to the Option such that 50% of the Option is
      immediately exercisable;

  (b) if the termination of your employment is effective after 31 March 2001 and
      before 31 August 2001, you shall receive acceleration of vesting of
      seventy-five percent (75%) of the unvested shares subject to the Option
      such that 75% of the Option is immediately exercisable;
<PAGE>

  (c) if the termination of your employment is effective on or after 31 August
      2001, you shall receive acceleration of vesting of all unvested shares
      subject to the Option such that 100% of the Option is immediately
      exercisable.

  If you have received additional shares of common stock pursuant to the
Additional Grant prior to the termination of your employment, you shall receive
accelerated vesting of the unvested shares subject to the Additional Grant on
the terms set forth in subparts (a), (b), and (c) of this Paragraph.

3.4  Termination for Cause.   In the event that the Company terminates your
employment for "Cause" (as defined below), you shall not be entitled to receive
any severance benefits, including, without limitation, those benefits described
in paragraph 3.3 above, or other compensation by the Company, except as to that
portion of any unpaid salary, incentive bonus and other benefits earned by you
up to and including the effective date of such termination and the ability to
exercise the vested portion of your options in accordance with the terms of your
Stock Option Agreement.

3.5  "Cause" Defined.  "Cause" shall mean any one of the following: (i) your
conviction (or plea of guilty or nolo contendere to) a felony, or committing an
act of dishonesty or fraud of the misappropriation of Company property, (ii)
your willful engagement in gross misconduct or willful neglect which are
significantly and demonstrably injurious to the Company, (iii) your failure or
refusal to perform duties of your position, such as a directive from the
Company's Board of Directors, the company's Chief Executive Officer or your then
supervisor (consistent with Section I hereof) which failure or refusal is not
cured within sixty (60) days after you are notified in writing of the specific
failure or refusal, (iv) your breach in any material respect the terms of this
Agreement or the Intellectual Property Agreement (as defined below); provided
that (except for those breaches which, by their nature, are incurable) this
provision shall not include a breach substantially cured by you within fifteen
(15) days after written notice by the Company to you of the specific breach, or
(v) your commencement of employment with another employer while you are employed
by the Company.

3.6  "Constructive Termination" Defined.  "Constructive Termination" shall mean
your voluntary termination, upon 30 days prior written notice to the Company,
following:

  (i)  a material (10% or more) reduction in your Base Salary as set forth in
       this Agreement (provided that any such reduction shall have no affect on
       the calculation of benefits or bonuses related to your termination), or a
       material reduction in the benefits afforded you by the Company, unless
       those benefits are reduced for other similarly situated employees at the
       same time; or

  (ii) a material reduction in job duties, responsibilities and requirements
       inconsistent with your position as set forth in this Agreement; provided,
       however, that (aa) a change in the corporate structure of the company,
       the company's reporting functions, or changes in titles which are not
       accompanied by a material reduction in day to day responsibilities and
       authority shall not be considered a "Constructive Termination"; (bb) a
       material reduction or change in duties solely by virtue of the company
       being acquired shall not constitute a "Constructive Termination" (e.g.
       when a certain employee or officer such as a COO remains as such
       following a change in control, with the same essential authority, job
       duties, responsibilities, as existed prior to the acquisition, but is not
       made the COO of the larger successor company); (cc) the employment of
       executive officers (such as a CFO) by the Company who may report directly
       to you, as Chief Operating Officer, and who may handle some of your
       duties or responsibilities under this Agreement shall not be considered a
       "Constructive Termination."

  (iii)in the event of; (a) the Employer's requirement that the Executive's
       primary business location be moved more than twenty (20) miles from San
       Francisco, California; (b) the Employer's absence of financial control or
       disclosure that violates statutory or regulatory law; (c) the Employer's
       illegal misconduct or other misconduct that violates statutory or
       regulatory law.

  (iv) Termination Upon Death or Disability.  If your employment is terminated
       as a result of your Death or Disability (as defined below), the Company
       will pay you, (or in the event of your death, your designated
       beneficiary), your Base Salary through the remainder of the calendar
       month during which such termination is effective and for six consecutive
       months thereafter net of any Employer-paid disability insurance benefits
<PAGE>

       paid to you during such period, provided that you (or in the event of
       your death, your designated beneficiary) must first execute a full mutual
       release of any and all claims between you and the Company.  For the
       purposes of this section, disability is defined as follows: you will be
       deemed to have a "disability" if, for physical or mental reasons, you are
       unable to perform the essential functions of your duties under this
       Agreement with or without reasonable accommodation for 120 consecutive
       days, or 180 days during any twelve-month period.  The disability will be
       determined by a mutually agreeable medical doctor.  You must submit to a
       reasonable number of examinations by the medical doctor making the
       determination of disability under this section and you hereby authorize
       the disclosure and release to the Company (who shall treat such
       information in the strictest confidence) of such determination and all
       supporting medical records.  If you are not legally competent, your legal
       guardian or duly authorized attorney-in-fact will act in your stead for
       the purposes of submitting you to the examinations, and providing the
       authorization and disclosure, required under this section.

3.7  No Disparagement.   During and following Executive's employment with the
Employer, neither the Executive nor the Employer and its directors, officers,
agents and affiliates shall make any disparaging comments (oral or written)
regarding the other.  Any comments (oral or written) regarding any termination
shall be approved in advance by the Executive and the Employer.  Notwithstanding
the foregoing, the Employer will not be required to obtain advance approval, and
will respond accurately and fully to any question, inquiry or request for
information, when required by law.

3.8  Voluntary Termination.  In the event that you terminate your employment
with the Company of your own volition and not as a result of circumstances
described in Section 3.6 above, such termination will have the same consequences
as a termination for Cause under Section 3.4 above.  No compensation or other
payments will be paid or provided to you for periods following the date when
such a termination of employment is effective, provided that any rights you may
have under the benefit plans of the Company shall be determined under the
provisions of those plans.

IV.  Additional Benefits.

4.1  Health Insurance/Vacation/Benefit Plans.  You will be entitled to receive
the standard employee benefits made available by the Company to its employees to
the full extent of your eligibility therefor.  You shall be entitled to four (4)
weeks of paid personal time off ("PTO") per year; the terms and conditions of
your benefits shall be in accordance with the Company's PTO policy in effect at
that time.  During your employment, you shall be permitted, to the extent
eligible, to participate in any group medical, dental, life insurance and
disability insurance plans, or similar benefit plan of the Company that is
available to employees generally.  Participation in any such plan shall be
consistent with your rate of compensation to the extent that compensation is a
determinative factor with respect to coverage under any such plan.

4.2  Reimbursed Expenses.  The Company shall reimburse you for all reasonable
and documented expenses incurred by you on behalf of the Company in the
performance of your duties as COO, including reasonable expenses incurred to
attend conventions and sponsorship events, costs for promotional expenses, and
professional dues and subscriptions appropriate for your employment position.
Any necessary air travel shall be coach for flights of two hours duration or
less, and business class for flights of more than two hours duration.  The
Company shall additionally pay you an automobile and parking allowance of
$500.00 per month.

4.3  Stock Options.  Pursuant to Board approval, and under the terms and
conditions of the Company's Stock Option Plan and Stock Option Agreement,
including the stock vesting provisions contained therein, you will be granted an
option to purchase one percent (1%) of the shares of common stock of the Company
at the Effective Date.  In addition, you will be have the opportunity to be
granted up to an additional .5% (one half percent) of the common stock of the
Company (such .5% as calculated on the Effective Date) (the "Additional Grant")
upon the achievement of the certain specific milestones pursuant to the
percentage ratios as determined in Section 3.2).  (For example, 20% of the .5%
of the Additional Grant shall be achieved upon the satisfaction of the criteria
established by Section 3.2).  Provided however, it is agreed that such potential
Additional Grant, in contrast to the potential cash bonuses provided in Section
3.2, shall not be renewed each year.  The Company Stock Option Plan, including
the Stock Option Agreement, will be sent to you separately.
<PAGE>

V.  Intellectual Property Rights/Confidential Information.

5.1  Valuable Trade Secrets.  You agree that the Company is the owner of
valuable trade secrets, client, vendor, customer and contractor lists and other
confidential and proprietary information.  As such, you agree that your
employment is contingent upon your execution of, and delivery to, the Company of
a Confidential Information and Invention Assignment Agreement ("Intellectual
Property Agreement") in the standard form utilized by the Company.

5.2  Additional Confidential Information. You agree to maintain the
confidentiality of all elements of this Agreement, agreeing to an absolute
prohibition on any disclosure or use of such information in any fashion, with
the exception of discussions with your supervisor or myself, and the Company's
Legal Department. As you are well aware the maintenance of confidentiality of
this kind of information is critical to our organization.

VI.  Prohibition Against Theft of Trade Secrets.

6.1  You are aware of the requirements of the Uniform Trade Secrets Act and
agree to abide by its terms.

VII.  Representations of Employee.  Employee represents that:

7.1  Execution of this Agreement and the Agreements contemplated herein
(including the Intellectual Property Agreement), and performance of your
obligations hereunder and thereunder, will not conflict with, or result in a
violation of or breach of any other agreement to which you are a party or any
judgment, order or decree to which you are subject.

VIII. Arbitration.

8.1  It is agreed that any dispute or controversy arising out of or relating to
any interpretation, construction, performance or breach of this Agreement or
your employment with Mediaplex shall be exclusively settled by arbitration to be
held in San Francisco County, California, in accordance with the rules then in
effect of the JAMS ENDISPUTE.  The arbitrator may grant injunctions or other
relief in such dispute or controversy.  The decision of the arbitration shall be
final, conclusive and binding on the parties to the arbitration.  Judgment may
be entered on the arbitrator's decision in any court having jurisdiction.
Mediaplex shall pay the full costs and expenses of such arbitration, and each of
you and the Company shall separately pay their respective counsel fees and
expenses.

8.2  At the request of either party hereto, the arbitrator will enter an
appropriate protective order to maintain the confidentiality of information
produced or exchanged in the course of the arbitration proceedings.

8.3  The arbitrator(s) shall apply California law to the merits of any dispute,
without reference to rules of conflicts of law.

8.4  The parties hereto agree that it would be impossible or inadequate to
measure and calculate the Company's damages from any breach of the your
covenants set forth in this Agreement.  Accordingly, you agree that if you
breach any provision of this Agreement, the Company will have available, in
addition to any other right or remedy otherwise available, the right to
injunctive relief restraining such breach or threatened breach and to specific
performance of any such provision of this Agreement.

8.5  The arbitration proceeding shall take place pursuant to the provisions of
C.C.P. Section 1280 et seq.  In particular, all rights of discovery are
allowable under C.C.P. Sections 1282.6, 1283 and 1283.05.

8.6  I HAVE READ AND UNDERSTAND THIS SECTION 8, WHICH DISCUSSES ARBITRATION.  I
UNDERSTAND THAT BY SIGNING THIS AGREEMENT, I AGREE, EXCEPT AS SET FORTH IN
SECTIONS 8.4 AND 8.5 ABOVE, TO SUBMIT ANY CLAIMS ARISING OUT OF ANY DISPUTE TO
BINDING ARBITRATION, AND THAT THIS ARBITRATION CLAUSE CONSTITUTES A WAIVER OF MY
RIGHTS TO A JURY TRIAL AND RELATES TO THE RESOLUTION OF ALL DISPUTES ARISING OUT
OF, RELATING TO OR IN CONNECTION WITH THIS AGREEMENT.
<PAGE>

IX.  General Provisions.

9.1  Governing Law.  This Agreement will be governed by the laws of the State of
California.

9.2  Entire Agreement.  This Agreement, with the Annexes thereto, sets forth the
entire agreement and understanding between the Company and you relating to your
employment and supersedes all prior verbal discussion and written agreements
between us.  Any subsequent change or changes in your duties, salary or other
compensation will not affect the validity or scope of this Agreement.  Any
change to the at-will term of this Agreement must be executed in writing and
signed by you and the Chief Executive Officer of the Company.

9.3  Successors/Assigns.  This Agreement will be binding upon your heirs,
executors, administrators and other legal representatives and will be for the
benefit of the Company and its respective successors and assigns.

Please acknowledge and confirm your acceptance of this letter by signing and
returning the enclosed copy of this offer letter, and the Confidential
Information and Invention Assignment Agreement as soon as possible.

If you have any questions about this offer letter, please call me directly.

MEDIAPLEX, INC.

By: /s/ Greg Raifman
   ------------------
Greg Raifman
Chief Executive Officer, Chairman of the Board

ACCEPTANCE:

I accept the terms of my employment with Mediaplex, Inc. as set forth herein.  I
understand that this offer letter does not constitute a contract of employment
for any specified period of time, and that my employment relationship may be
terminated by either party, with or without cause and with or without notice.

Mr. Costa John

  /s/  Costa John
---------------------------

  1/15/01
---------------------------
Date

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