Document:

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                                                                    Exhibit 10.2

                          SHAREHOLDER SUPPORT AGREEMENT

      THIS SHAREHOLDER SUPPORT AGREEMENT (this "Agreement") is made and entered
into as of February 8, 2005, by and among WebSideStory, Inc., a Delaware
corporation ("Parent"), and each of the undersigned shareholders (each a
"Shareholder") of Avivo Corporation, a California corporation (the "Company").

                                    Recitals

      A. Concurrently with the execution and delivery hereof, Parent, WSSI
Acquisition Company, a California corporation and a direct, wholly owned
subsidiary of Parent ("Merger Sub"), and the Company are entering into an
Agreement and Plan of Merger of even date herewith (as it may be amended from
time to time pursuant to the terms thereof, the "Merger Agreement"), which
provides for the two-step merger (the "Merger") of Merger Sub with and into the
Company, and the Company with and into a wholly-owned subsidiary of Parent, in
accordance with the terms of the Merger Agreement.

      B. Shareholder is the beneficial owner (as defined in Rule 13d-3 under the
Securities Exchange Act of 1934, as amended) of, and has the right to direct the
voting of, the number of shares of Company Common Stock and Company Preferred
Shares indicated on the signature page of this Agreement.

      C. In consideration of the execution and delivery of the Merger Agreement
by Parent and Merger Sub, Shareholder desires to agree to vote the Shares (as
defined herein) over which Shareholder has voting power so as to facilitate the
consummation of the Merger.

      NOW, THEREFORE, intending to be legally bound, the parties hereto hereby
agree as follows:

      1. Certain Definitions. Capitalized terms used but not otherwise defined
herein shall have the meanings ascribed thereto in the Merger Agreement. For all
purposes of and under this Agreement, the following terms shall have the
following respective meanings:

                  "Shares" means (i) all shares of Company Common Stock owned,
      beneficially or of record, by Shareholder as of the date hereof, (ii) all
      additional shares of Company Common Stock acquired by Shareholder,
      beneficially or of record, during the period commencing with the execution
      and delivery of this Agreement and expiring on the Expiration Date (as
      such term is defined in Section 10 below), including, without limitation,
      shares of Company Common Stock acquired by Shareholder upon the exercise
      of Company Options or conversion of Company Preferred Stock, (iii) all
      shares of Company Preferred Stock owned, beneficially or of record, by
      Shareholder as of the date hereof, and (iv) all additional shares of
      Company Preferred Stock acquired by Shareholder, beneficially or of
      record, during the period commencing with the execution and delivery of
      this Agreement and expiring on the Expiration Date.

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                  "Transfer" means, with respect to any security, the direct or
      indirect assignment, sale, transfer, tender, pledge, hypothecation, or the
      grant, creation or sufferage of an option, lien or encumbrance in or upon,
      or the placement in trust, or other disposition of such security or any
      right, title or interest therein (including, but not limited to, any right
      or power to vote to which the holder thereof may be entitled, whether such
      right or power is granted by proxy or otherwise), or the record or
      beneficial ownership thereof, the offer to make such a sale, transfer or
      other disposition, and each agreement, arrangement or understanding,
      whether or not in writing, to effect any of the foregoing.

      2. Transfer and Voting Restrictions.

            (a) At all times during the period commencing with the execution and
delivery of this Agreement and expiring on the Expiration Date, Shareholder
shall not, except in accordance with the Merger Agreement, Transfer any of the
Shares, or discuss, negotiate, make an offer or enter into an agreement,
commitment or other arrangement with respect thereto; provided that Shareholder
may Transfer any of the Shares (i) as bona fide gifts, (ii) to any family
member, trust or other Person in a transaction that is principally for estate
planning purposes (iii) to any beneficiary, executor, trust, legal guardian or
legal representative upon the death or disability of Shareholder or (iv) to a
partnership transferring to its partners or former partners in accordance with
partnership interests, or (v) to a limited liability company transferring to its
members or former members in accordance with their interest in the limited
liability company, (collectively, "Permitted Transfers"); provided that, prior
to any such Permitted Transfer, the transferee shall have (x) executed a
counterpart of this Agreement and (y) agreed in writing to hold such Shares (or
interest in such Shares) subject to all of the terms and provisions of this
Agreement.

            (b) From and after the date hereof until the Expiration Date,
Shareholder will not enter into any voting agreement with any Person with
respect to any of the Shares, grant any Person any proxy (revocable or
irrevocable) or power of attorney with respect to any of the Shares, deposit any
of the Shares in a voting trust or otherwise enter into any agreement or
arrangement with any Person limiting or affecting Shareholder's legal power,
authority or right to vote the Shares in favor of the approval and adoption of
the Merger Agreement (the "Merger Proposal").

            (c) Shareholder agrees that Parent may notify the Company of the
restriction on Transfer set forth in this Section 2.

      3. Agreement to Vote Shares.

            (a) Prior to the Expiration Date, at every meeting of the
shareholders of the Company called, and at every adjournment or postponement
thereof, and on every action or approval by written consent of the shareholders
of the Company, Shareholder (in Shareholder's capacity as such) shall appear at
the meeting or otherwise cause the Shares to be present thereat for purposes of
establishing a quorum and, to the extent not voted by the persons appointed as
proxies pursuant to this Agreement, shall vote the Shares (i) in favor of the
Merger Proposal, (ii) against the approval or adoption of any proposal made in
opposition to, or in competition with, the Merger Proposal, and (iii) against
any of the following (to the extent unrelated to the

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Merger or the Merger Proposal): (A) any merger, consolidation or business
combination involving the Company or any of its subsidiaries other than the
Merger; (B) any sale, lease or transfer of all or substantially all of the
assets of the Company or any of its subsidiaries; (C) any reorganization,
recapitalization, dissolution, liquidation or winding up of the Company or any
of its subsidiaries; or (D) any other action that is intended, or would
reasonably be expected to, impede, interfere with or materially delay, postpone,
discourage or adversely affect the consummation of the Merger, including, but
not limited to, any amendment of the Company Articles of Incorporation or
Company Bylaws (each of (ii) and (iii), a "Competing Transaction").

            (b) If Shareholder is the beneficial owner, but not the record
holder, of the Shares, Shareholder agrees to take all reasonable actions
necessary to cause the record holder and any nominees to vote all of the Shares
in the manner provided in Section 3(a).

      4. Grant of Irrevocable Proxy.

            (a) Shareholder hereby irrevocably (to the fullest extent permitted
by law) grants to, and appoints, Parent and each of its executive officers and
any of them, in their capacities as officers of Parent, Shareholder's proxy and
attorney-in-fact (with full power of substitution and re-substitution), for and
in the name, place and stead of Shareholder, to vote the Shares, to instruct
nominees or record holders to vote the Shares, or grant a consent or approval in
respect of such Shares in favor of the Merger Proposal and against any Competing
Transaction.

            (b) Shareholder represents that any proxies heretofore given in
respect of the Shares that would affect Shareholder's ability to vote its Shares
in accordance with Section 3 that may still be in effect are not irrevocable,
and that any such proxies are hereby revoked.

            (c) Shareholder hereby affirms that the irrevocable proxy set forth
in this Section 4 is given in connection with the execution of the Merger
Agreement, and that such irrevocable proxy is given to secure the performance of
the duties of Shareholder under this Agreement. Shareholder hereby further
affirms that the irrevocable proxy is coupled with an interest and may under no
circumstances be revoked. Such irrevocable proxy is executed and intended to be
irrevocable in accordance with the applicable provisions of the General
Corporation Law of the State of California.

      5. No Solicitation. From and after the date hereof until the Expiration
Date, Shareholder, in his or her capacity as a Shareholder, shall not directly
or indirectly, solicit, initiate or encourage any offer from, or engage or
participate in any discussions or negotiations with, or provide any confidential
information about the Company to, any Person other than Parent concerning, or
enter into any agreement providing for, or otherwise effect or consummate, any
Competing Tranasaction. If, notwithstanding the foregoing, Shareholder shall
receive any proposal for such a transaction, he or she shall promptly inform
Parent.

      6. Action in Shareholder Capacity Only. Shareholder makes no agreement or
understanding herein as director or officer of the Company or as a fiduciary of,
or participant in, the Company Option Plan. Shareholder has entered into this
Agreement solely in his or her capacity as a record holder and/or beneficial
owner of Shares, and nothing herein shall limit or

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affect any actions taken in his or her capacity as an officer or director of the
Company or as a fiduciary of, or participant in, the Company Option Plan.

      7. Representations and Warranties of Shareholder.

            (a) Shareholder hereby represents and warrants to Parent as follows:
(i) Shareholder is the beneficial or record owner of the shares of Company
Capital Stock indicated on the signature page of this Agreement, free and clear
of any and all pledges, liens, security interests, claims, charges,
restrictions, options or encumbrances (except as the same may arise under
securities laws); (ii) Shareholder does not beneficially own any securities of
the Company other than the shares of Company Capital Stock and Company Options
set forth on the signature page of this Agreement; (iii) Shareholder has full
power and authority to make, enter into and carry out the terms of this
Agreement and to grant the irrevocable proxy as set forth in Section 4; and (iv)
this Agreement has been duly and validly executed and delivered by Shareholder
and constitutes a valid and binding agreement of Shareholder enforceable against
it/him/her in accordance with the Agreement's terms, subject to laws of general
application relating to injunctive relief or other equitable remedies and
applicable bankruptcy, insolvency and other laws relating to or affecting the
enforcement of creditors' rights generally.

            (b) Except for this Agreement or as otherwise permitted by this
Agreement, Shareholder has full legal power, authority and right to vote or to
direct the voting of all of the Shares then owned of record or beneficially by
him or her, in favor of the Merger Proposal without the consent or approval of,
or any other action on the part of, any other Person.

            (c) The execution and delivery of this Agreement and the performance
by Shareholder of his or her agreements and obligations hereunder will not
result in any breach or violation of or be in conflict with or constitute a
default under any term of any agreement, judgment, injunction, order, decree,
law, regulation or arrangement to which Shareholder is a party or by which
Shareholder (or any of his or her assets) is bound, except for any such breach,
violation, conflict or default which, individually or in the aggregate, would
not impair or adversely affect Shareholder's ability to perform his or her
obligations under this Agreement or render inaccurate any of the representations
made by him or her herein.

      8. Waiver of Rights of Appraisal. Shareholder hereby waives any rights of
appraisal with respect to the Merger, or rights to dissent from the Merger, that
such Shareholder may have under the applicable provisions of the General
Corporation Law of the State of California.

      9. Confidentiality. Shareholder recognizes that successful consummation of
the transactions contemplated by the Merger Agreement may be dependent upon
confidentiality with respect to the matters referred to herein. In this
connection, pending public disclosure thereof by Parent and the Company,
Shareholder hereby agrees not to disclose or discuss such matters with anyone
not a party to this Agreement (other than its counsel, affiliated parties,
advisors, if any, and the executive officers of the Company) without the prior
written consent of Parent and the Company (which consent shall not be
unreasonably withheld, conditioned or delayed), except for disclosures
Shareholder's counsel advises are necessary in order to fulfill any obligations
of Shareholder imposed by Law, in which event Shareholder shall give notice of
such disclosure to Parent and the Company as promptly as practicable so as to
enable Parent and the Company to

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seek a protective order from a court of competent jurisdiction with respect
thereto. The Company shall be a third party beneficiary of this Section 9.

      10. Termination. This Agreement shall terminate and be of no further force
or effect whatsoever as of the earlier of (i) such date and time as the Merger
Agreement shall have been validly terminated pursuant to the terms of Article IX
thereof, (ii) the Effective Time or (iii) upon the determination by the
California Department of Corporations that it shall not approve the terms and
conditions of the Merger Agreement unless and until this Agreement is terminated
(the "Expiration Date"). Upon such termination, no party shall have any further
obligations or liabilities hereunder; provided, that such termination shall not
relieve any party from liability for any breach of this Agreement prior to such
termination.

      11. Miscellaneous Provisions.

            (a) Amendments, Modifications and Waivers. No amendment,
modification or waiver in respect of this Agreement shall be effective against
any party unless it shall be in writing and signed by Parent and the
Shareholder.

            (b) Entire Agreement. This Agreement constitutes the entire
agreement among the parties to this Agreement and supersede all other prior
agreements and understandings, both written and oral, between the parties with
respect to the subject matter hereof.

            (c) Governing Law. This Agreement shall be governed by and construed
in accordance with the laws of the State of California, regardless of the laws
that might otherwise govern under applicable principles of conflicts of law
thereof.

            (d) Assignment and Successors. This Agreement and all of the
provisions hereof shall be binding upon and inure to the benefit of the parties
hereto and their respective successors and permitted assigns, provided that
except as otherwise specifically provided herein, neither this Agreement nor any
of the rights, interests or obligations of the parties hereto may be assigned by
any party hereto without prior written consent of the other party hereto except
as expressly contemplated by Section 2(a) hereof and except that Parent, without
obtaining the consent of Shareholder, shall be entitled to assign this Agreement
to any party to which it is entitled to assign this Agreement to under Section
11.6 under the Merger Agreement but no assignment by Parent under this Section
11(d) shall relieve Parent of its obligations under this Agreement. Any
assignment in violation of the foregoing shall be void and of no effect.

            (e) No Third Party Rights. Except as provided by Section 9 hereof,
nothing in this Agreement, express or implied, is intended to or shall confer
upon any Person (other than the parties hereto) any right, benefit or remedy of
any nature whatsoever under or by reason of this Agreement.

            (f) Cooperation. Shareholder agrees to cooperate fully with Parent
and to execute and deliver such further documents, certificates, agreements and
instruments and to take such other actions as may be reasonably requested by
Parent to evidence or reflect the transactions contemplated by this Agreement
and to carry out the intent and purpose of this Agreement. Shareholder hereby
agrees that Parent may publish and disclose such Shareholder's

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identity and ownership of Shares and the nature of such Shareholder's
commitments, arrangements and understandings under this Agreement as may be
required by applicable Law in any filing made by Parent with the Securities and
Exchange Commission relating to the Proposed Transaction.

            (g) Severability. If any provision of this Agreement is held invalid
or unenforceable by any court of competent jurisdiction, the other provisions of
this Agreement will remain in full force and effect. Any provision of this
Agreement held invalid or unenforceable only in part or degree will remain in
full force and effect to the extent not held invalid or unenforceable.

            (h) Specific Performance; Injunctive Relief. Shareholder
acknowledges that Parent (and with respect to Section 9 hereof, the Company)
shall be irreparably harmed and that there shall be no adequate remedy at law
for a violation of any of the covenants or agreements of Shareholder set forth
in this Agreement. Therefore, Shareholder hereby agrees that, in addition to any
other remedies that may be available to Parent (and with respect to Section 9
hereof, the Company), as applicable upon any such violation, such party shall
have the right to enforce such covenants and agreements by specific performance,
injunctive relief or by any other means available to such party at law or in
equity without posting any bond or other undertaking.

            (i) Notices. All notices, consents, requests, claims, demands and
other communications under this Agreement shall be in writing and shall be
deemed given if (a) delivered to the appropriate address by hand or overnight
courier (providing proof of delivery), or (b) sent by facsimile or e-mail with
confirmation of transmission by the transmitting equipment confirmed with a copy
delivered as provided in clause (a), in each case to the parties at the
following address, facsimile or e-mail address (or at such other address,
facsimile or e-mail address for a party as shall be specified by like notice):
(i) if to Parent or Company, to the address, e-mail address or facsimile
provided in the Merger Agreement, including to the persons designated therein to
receive copies; and (ii) if to Shareholder, to Shareholder's address, e-mail
address or facsimile shown below Shareholder's on the signature pages hereof.

            (j) Counterparts. This Agreement may be executed in several
counterparts, each of which shall be deemed an original and all of which shall
constitute one and the same instrument, and shall become effective when
counterparts have been signed by each of the parties and delivered to the other
parties; it being understood that all parties need not sign the same
counterpart.

            (k) Headings. The headings contained in this Agreement are for the
convenience of reference only, shall not be deemed to be a part of this
Agreement and shall not be referred to in connection with the construction or
interpretation of this Agreement.

                       [Signatures on the Following Pages]

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      IN WITNESS WHEREOF, the undersigned have caused this Agreement to be duly
executed as of the date first above written.

                          WEBSIDESTORY, INC.:

                          __________________________________________
                          By:
                          Its:

                          SHAREHOLDER:

                          SOFINNOVA CAPITAL III,
                          a ______________________

                          By: ______________________________________
                          Name:
                          Title:

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]

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                          SHAREHOLDER:
                          SOFINNOVA VENTURE AFFILIATES IV, L.P.,
                          a ____________ limited partnership

                          By: ______________________________________
                          Name:
                          Title:

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]

<PAGE>

                          SHAREHOLDER:
                          SOFINNOVA VENTURE PARTNERS, L.P.,
                          a _______ limited partnership

                          By: ______________________________________
                          Name:
                          Title:

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]

<PAGE>

                          SHAREHOLDER:

                          NEW ENTERPRISE ASSOCIATES 10, L.P.,
                          a __________ limited partnership

                          By: ______________________________________
                          Name:
                          Title:

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]

<PAGE>

                          SHAREHOLDER:
                          NEA VENTURES 2000, L.P.,
                          a __________ limited partnership

                          By: ______________________________________
                          Name:
                          Title:

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]

<PAGE>

                          SHAREHOLDER:

                          __________________________________
                          CHARLES M. LINEHAN

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]

<PAGE>

                          SHAREHOLDER:

                          __________________________________
                          STEVEN R. KUSMER

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]

<PAGE>

                          SHAREHOLDER:

                          __________________________________
                          MICHAEL P. THOMPSON

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]

<PAGE>

                          SHAREHOLDER:

                          __________________________________
                          KEVIN G. WALLACE

                          Address:

                          _________________________
                          _________________________
                          _________________________

                          Telephone:(___) ________-_______________
                          Facsimile:(___) ________-_______________
                          E-Mail Address:    ___________________

                          Shares Beneficially Owned:

                          ___________ shares of Company Common Stock

                          ___________ shares of Company Series A Preferred Stock

                          ___________ shares of Company Series B Preferred Stock

                          ___________ shares of Company Series C Preferred Stock

                          ___________ Company Options

          [Counterpart Signature Page to Shareholder Support Agreement]<PAGE>

                                                                    Exhibit 10.3

                               WEBSIDESTORY, INC.

               AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

         This Amended and Restated Registration Rights Agreement (this
"AGREEMENT") dated as of ____________, 2005 is entered into by and among
WebSideStory, Inc., a Delaware corporation (the "COMPANY"), certain investors as
listed on Schedule A attached hereto (each an "EXISTING INVESTOR," and
collectively, the "EXISTING INVESTORS") and certain entities and individuals as
listed on Schedule B attached hereto (each an "AVIVO INVESTOR," and
collectively, the "AVIVO INVESTORS," and together with the Existing Investors,
the "INVESTORS").

                                    RECITALS

         WHEREAS, the Company and the Existing Investors entered into that
certain Registration Rights Agreement dated June 18, 1999, as amended on June
30, 2000, December 12, 2000, March 2, 2001, July 21, 2004 and September 16, 2004
(collectively, the "ORIGINAL AGREEMENT"), under which the Company granted
certain registration rights to the Existing Investors;

         WHEREAS, the Company, WSSI Acquisition Company, a California
corporation and a direct, wholly owned subsidiary of the Company ("MERGER SUB"),
and Avivo Corporation, a California corporation ("AVIVO") have previously
entered into an Agreement and Plan of Merger, dated as of February 8, 2005 (as
it may be amended from time to time pursuant to the terms thereof, the "MERGER
AGREEMENT"), which provides for the two-step merger (the "MERGER") of Merger Sub
with and into Avivo, and Avivo with and into a wholly-owned subsidiary of the
Company, in accordance with the terms of the Merger Agreement;

         WHEREAS, as a condition to consummating the Merger, the Company and the
Existing Investors are required to enter into this Agreement to grant the Avivo
Investors certain registration rights hereunder;

         WHEREAS, the Original Agreement provides that an amendment of the
Original Agreement may be effected by the written consent of the Company and a
Majority Interest (as such term is defined in the Original Agreement) of the
Existing Investors;

         WHEREAS, the undersigned Existing Investors constitute holders of not
less than a Majority Interest of the Existing Investors and, therefore, are
entitled to bind all other holders of Registrable Securities (as such term is
defined in the Original Agreement) who are parties to the Original Agreement;
and

         WHEREAS, the Company and the Existing Investors hereby agree that the
Original Agreement shall be superseded and replaced in its entirety by this
Agreement.

<PAGE>

                                    AGREEMENT

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
set forth herein and for other good and valuable consideration, the receipt and
adequacy of which are hereby acknowledged, the parties hereby agree as follows:

         1. Certain Definitions. As used in this Agreement, the following terms
shall have the following respective meanings:

         "BOARD OF DIRECTORS" means the Board of Directors of the Company.

         "COMMISSION" shall mean the United States Securities and Exchange
Commission, or any other federal agency at the time administering the Securities
Act and the Exchange Act.

         "COMMON STOCK" shall mean the common stock of the Company and any other
securities into which or for which such common stock may be converted or
exchanged pursuant to a plan of recapitalization, reorganization, merger, sale
of assets or otherwise.

         "COMPANY" shall refer to the Company and any successor or successors
thereto.

         "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
amended, or any similar successor federal statute, and the rules and regulations
of the Commission thereunder, all as the same shall be in effect at the time.

         "MAJORITY INTEREST" means the Existing Investors holding not less than
a majority in interest in the outstanding Registrable Securities held by all
Existing Investors.

         "PERSON" shall mean an individual, a corporation, a partnership, a
joint venture, a trust, an unincorporated organization, a limited liability
company or partnership, a government and any agency or political subdivision
thereof.

         "REGISTRABLE SECURITIES" shall mean (i) any shares of Common Stock that
constituted Registrable Securities pursuant to the terms of the Original
Agreement (or with respect to the Avivo Investors, issued pursuant to the terms
of the Merger Agreement) and (ii) any other securities issued and issuable with
respect to any such shares described in clause (i) above by way of a stock
dividend or stock split or in connection with a combination of shares,
recapitalization, merger, consolidation or other reorganization; provided,
however, that notwithstanding anything to the contrary contained herein,
"REGISTRABLE SECURITIES" shall not at any time include any securities (i)
registered and sold pursuant to the Securities Act, (ii) sold to the public
pursuant to Rule 144, (iii) which could then be sold in their entirety pursuant
to Rule 144(k) without limitation or restriction, (iv) shares of Common Stock
issued upon exercise of stock options or issued upon restricted stock grants or
(v) shares acquired in open market transactions.

         "REGISTRATION EXPENSES" shall mean the expenses so described in Section
5 hereof.

         "RULE 144" shall mean Rule 144 promulgated under the Securities Act (or
any comparable successor rules).

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<PAGE>

         "SECURITIES ACT" shall mean the Securities Act of 1933, as amended, or
any similar successor federal statute, and the rules and regulations of the
Commission thereunder, all as the same shall be in effect at the time.

         2. Demand Registrations.

                  (a) At any time after the date hereof, a Majority Interest of
                  the Investors may notify the Company that they intend to offer
                  or cause to be offered for public sale all or any portion of
                  their Registrable Securities (representing offering proceeds
                  aggregating not less than $10 million) in the manner specified
                  in such request. Upon receipt of such request, the Company
                  shall promptly deliver notice of such request to all Persons
                  holding Registrable Securities who shall then have thirty (30)
                  days to notify the Company in writing of their desire to be
                  included in such registration. If the request for registration
                  contemplates an underwritten public offering, the Company
                  shall state such in the written notice and in such event the
                  right of any Person to participate in such registration shall
                  be conditioned upon their participation in such underwritten
                  public offering and the inclusion of their Registrable
                  Securities in the underwritten public offering to the extent
                  provided herein. The Company will use its reasonable best
                  efforts to expeditiously effect the registration of all
                  Registrable Securities whose holders request participation in
                  such registration under the Securities Act and to qualify such
                  Registrable Securities for sale under any state blue sky law;
                  provided, however, that the Company shall not be required to
                  effect registration pursuant to a request under this Section 2
                  more than two (2) times for the holders of the Registrable
                  Securities as a group. Notwithstanding anything to the
                  contrary contained herein, if the Company receives a request
                  for registration under this Section 2, then (i) the Company
                  may advise the requesting Investors, within fifteen (15) days
                  of its receipt of such request, that it intends to file a
                  registration statement for the primary issuance of securities
                  in an underwritten public offering, and (ii) assuming that the
                  Company files such registration statement within seventy-five
                  (75) days of its receipt of such request, the Company's
                  registration obligations under this Section 2 shall not apply
                  with respect to such request and no additional request may be
                  made under this Section 2 within one hundred eighty (180) days
                  after the effective date of such registration statement. In
                  addition, the Company may postpone the filing or the
                  effectiveness of any registration statement pursuant to this
                  Section 2 for a reasonable time period, provided that such
                  postponements shall not exceed one hundred twenty (120) days
                  in the aggregate during any twelve (12) month period, if (i)
                  the Company has been advised by legal counsel that such filing
                  or effectiveness would require disclosure of a material
                  financing, acquisition or other corporate transaction or
                  development, and the Board of Directors of the Company
                  determines in good faith that such disclosure is not in the
                  best interests of the Company and its stockholders or (ii) the
                  Board of Directors of the Company determines in good faith
                  that there is a valid business purpose or reason for delaying
                  filing or effectiveness. A registration will not count as a
                  requested registration under this Section 2(a) until the
                  registration statement relating to such registration has been
                  declared effective by the Commission at the request of the
                  initiating holders; provided, however, that, if a

                                        3
<PAGE>

                  Majority Interest of the participating holders of Registrable
                  Securities shall request, in writing, that the Company
                  withdraw a registration statement which has been filed under
                  this Section 2(a) but not yet been declared effective, a
                  majority in interest of such holders may thereafter request
                  the Company to reinstate such registration statement, if
                  permitted under the Securities Act, or to file another
                  registration statement, in accordance with the procedures set
                  forth herein.

                  (b) If a requested registration pursuant to Section 2(a)
                  involves an underwritten public offering and the managing
                  underwriter of such offering determines in good faith that the
                  number of securities sought to be offered should be limited
                  due to market conditions, then the number of securities to be
                  included in such underwritten public offering shall be reduced
                  to a number deemed satisfactory by such managing underwriter,
                  provided that the shares to be excluded shall be determined in
                  the following sequence: (i) first, securities held by any
                  other Persons (other than the Investors holding Registrable
                  Securities) not having either registration rights or
                  contractual, incidental "piggy back" rights to include such
                  securities in the registration statement, (ii) second, shares
                  sought to be registered by the Company, and (iii) third,
                  Registrable Securities, it being understood that no shares
                  shall be registered for the account of the Company or any
                  shareholder other than the Investors unless all Registrable
                  Securities for which Investors have requested registration
                  have been registered. If there is a reduction of the number of
                  Registrable Securities pursuant to clauses (i) or (iii), such
                  reduction shall be made on a pro rata basis (based upon the
                  aggregate number of shares of Registrable Securities held by
                  the holders in each tranche and subject to the priorities set
                  forth in the preceding sentence).

                  (c) With respect to a request for registration pursuant to
                  Section 2(a) which is for an underwritten public offering, the
                  managing underwriter shall be chosen by the Investors holding
                  not less than a Majority Interest of the Registrable
                  Securities to be sold in such offering, subject to the
                  Company's consent, which consent shall not be unreasonably
                  withheld. The Company may not cause any other registration of
                  securities for sale for its own account (other than a
                  registration effected solely to implement an employee benefit
                  plan or a transaction to which Rule 145 of the Securities Act
                  is applicable) to become effective within one hundred eighty
                  (180) days following the effective date of any registration
                  required pursuant to this Section 2 or such lesser period as
                  may be consented to by the managing underwriter.

         3. Piggyback Registration. If the Company at any time proposes to
register any of its Common Stock under the Securities Act for sale to the public
(including pursuant to a demand under Section 2 hereof as provided therein and
except with respect to registration statements on Forms S-4, S-8 or another form
not available for registering the Registrable Securities for sale to the
public), each such time it will give written notice at the applicable address of
record to each holder of Registrable Securities of its intention to do so. Upon
the written request of any of such holders of the Registrable Securities, given
within thirty (30) days after receipt by such Person of such notice, the Company
will, subject to the limits contained in this Section 3, use its reasonable best
efforts to cause all such Registrable Securities of said requesting holders to
be registered

                                        4
<PAGE>

under the Securities Act and qualified for sale under any state blue sky law,
all to the extent required to permit such sale or other disposition of said
Registrable Securities; provided, however, that if the Company is advised in
writing in good faith by any managing underwriter of the Company's securities
being offered in a public offering pursuant to such registration statement that
the amount to be sold by persons other than the Company (collectively, "SELLING
STOCKHOLDERS") is greater than the amount which can be offered without adversely
affecting the offering, the Company may reduce the amount offered for the
accounts of Selling Stockholders (including such holders of shares of
Registrable Securities) to a number deemed satisfactory by such managing
underwriter; and provided further, that the shares to be excluded shall be
determined in the following sequence (except with respect to a demand under
Section 2 hereof): (i) first, securities held by any Persons not having any such
contractual, incidental registration rights; (ii) second, securities held by any
Persons having contractual, incidental registration rights pursuant to an
agreement which is not this Agreement; (iii) third, securities held by the
Founders (as defined in the Stock Purchase Agreement, dated as of June 19, 1999,
by and among the Company, the Founders and the investors named in Exhibit A
thereto); and (iv) fourth, all Registrable Securities in each case as determined
on a pro rata basis in accordance with their holdings. Notwithstanding the
foregoing, in no event shall the number of Registrable Securities included in a
registration pursuant to this section be reduced to less than twenty percent
(20%) of all shares to be registered.

         4. Registration Procedures. If and whenever the Company is required by
the provisions of this Agreement to use its reasonable best efforts to effect
the registration of any of its securities under the Securities Act, the Company
will, as expeditiously as possible:

                  (a) use its best efforts diligently to prepare and file with
                  the Commission a registration statement on the appropriate
                  form under the Securities Act with respect to such securities,
                  which form shall comply as to form in all material respects
                  with the requirements of the applicable form and include all
                  financial statements required by the Commission to be filed
                  therewith, and use its reasonable best efforts to cause such
                  registration statement to become and remain effective until
                  completion of the proposed offering (but not for more than one
                  hundred eighty (180) days);

                  (b) prepare and file with the Commission such amendments and
                  supplements to such registration statement and the prospectus
                  used in connection therewith as may be necessary to keep such
                  registration statement effective until the completion of the
                  offering (but not for more than one hundred eighty (180) days)
                  and to comply with the provisions of the Securities Act with
                  respect to the sale or other disposition of all securities
                  covered by such registration statement whenever the seller or
                  sellers of such securities shall desire to sell or otherwise
                  dispose of the same, but only to the extent provided in this
                  Agreement;

                  (c) furnish to each selling holder of Registrable Securities
                  and the underwriters, if any, such number of copies of such
                  registration statement, any amendments thereto, any documents
                  incorporated by reference therein, the prospectus, including a
                  preliminary prospectus, in conformity with the requirements of
                  the Securities Act, and such other documents as such selling

                                        5
<PAGE>

                  holder may reasonably request in order to facilitate the
                  public sale or other disposition of the securities owned by
                  such selling holder;

                  (d) use its best efforts to register or qualify the securities
                  covered by such registration statement under and to the extent
                  required by such other securities or state blue sky laws of
                  such jurisdictions as each selling holder of Registrable
                  Securities shall reasonably request, and do any and all other
                  acts and things which may be necessary under such securities
                  or blue sky laws to enable such selling holder to consummate
                  the public sale or other disposition in such jurisdictions of
                  the securities owned by such selling holder, except that the
                  Company shall not for any such purpose be required to qualify
                  to do business as a foreign corporation in any jurisdiction
                  wherein it is not so qualified;

                  (e) within a reasonable time before each filing of the
                  registration statement or prospectus or amendments or
                  supplements thereto with the Commission, furnish to counsel
                  selected by the holders of a Majority Interest copies of such
                  documents proposed to be filed, which documents shall be
                  subject to the reasonable approval of such counsel, which
                  approval shall not be unreasonably withheld;

                  (f) promptly notify each selling holder of Registrable
                  Securities, such selling holders' counsel and any underwriter
                  and (if requested by any such Person) confirm such notice in
                  writing, of the happening of any event which makes any
                  statement made in the registration statement or related
                  prospectus untrue or which requires the making of any changes
                  in such registration statement or prospectus so that they will
                  not contain any untrue statement of a material fact or omit to
                  state any material fact required to be stated therein or
                  necessary to make the statements therein in the light of the
                  circumstances under which they were made not misleading; and,
                  as promptly as practicable thereafter, prepare and file with
                  the Commission and furnish a supplement or amendment to such
                  prospectus so that, as thereafter deliverable to the
                  purchasers of such Registrable Securities, such prospectus
                  will not contain any untrue statement of a material fact or
                  omit to state a material fact necessary to make the statements
                  therein, in the light of the circumstances under which they
                  were made, not misleading;

                  (g) use its reasonable best efforts to prevent the issuance of
                  any order suspending the effectiveness of a registration
                  statement, and if one is issued use its reasonable best
                  efforts to obtain the withdrawal of any order suspending the
                  effectiveness of a registration statement at the earliest
                  possible moment;

                  (h) if requested by the managing underwriter or underwriters
                  (if any), any selling holder of Registrable Securities, or
                  such selling holder's counsel, promptly incorporate in a
                  prospectus supplement or post-effective amendment such
                  information as such Person requests to be included therein
                  with respect to the selling holder or the securities being
                  sold, including, without limitation, with respect to the
                  securities being sold by such selling holder to such
                  underwriter or underwriters, the purchase price being paid
                  therefor by such underwriter or underwriters and with respect
                  to any other terms of an underwritten offering of

                                        6
<PAGE>

                  the securities to be sold in such offering, and promptly make
                  all required filings of such prospectus supplement or
                  post-effective amendment;

                  (i) make available to each selling holder of Registrable
                  Securities, any underwriter participating in any disposition
                  pursuant to a registration statement, and any attorney,
                  accountant or other agent or representative retained by any
                  such selling holder or underwriter (collectively, the
                  "INSPECTORS"), all financial and other records, pertinent
                  corporate documents and properties of the Company
                  (collectively, the "RECORDS"), as shall be reasonably
                  necessary to enable them to exercise their due diligence
                  responsibility, and cause the Company's officers, directors
                  and employees to supply all information requested by any such
                  Inspector in connection with such registration statement
                  subject, in each case, to such confidentiality agreements as
                  the Company shall reasonably request;

                  (j) enter into any reasonable underwriting agreement required
                  by the proposed underwriter(s) for the selling holders of
                  Registrable Securities, if any, and use its reasonable best
                  efforts to facilitate the public offering of the securities;

                  (k) request that each prospective selling holder be furnished
                  a signed counterpart, addressed to the prospective selling
                  holder, of , if and to the extent permitted applicable
                  professional standards, a "comfort" letter signed by the
                  independent public accountants who have certified the
                  Company's financial statements included in the registration
                  statement, covering substantially the same matters with
                  respect to the registration statement (and the prospectus
                  included therein) and with respect to events subsequent to the
                  date of the financial statements, as are customarily covered
                  (at the time of such registration) in accountants' letters
                  delivered to the underwriters in underwritten public offerings
                  of securities;

                  (l) use its reasonable best efforts to cause the securities
                  covered by such registration statement to be listed on the
                  securities exchange or quoted on the quotation system on which
                  the Common Stock is then listed or quoted (or, if the Common
                  Stock is not yet listed or quoted, then on such exchange or
                  quotation system as the selling holders of Registrable
                  Securities and the Company shall determine);

                  (m) otherwise use its reasonable best efforts to comply with
                  all applicable rules and regulations of the Commission and
                  make generally available to its security holders, in each case
                  as soon as reasonably practicable, but not later than 90 days
                  after the close of the period covered thereby, an earnings
                  statement of the Company which will satisfy the provisions of
                  Section 11(a) of the Securities Act and Rule 158 thereunder
                  (or any comparable successor provisions); and

                  (n) otherwise cooperate with the underwriter(s), the
                  Commission and other regulatory agencies and take all
                  reasonable actions and execute and deliver or cause to be
                  executed and delivered all documents reasonably necessary to
                  effect the registration of any securities under this
                  Agreement.

                                        7
<PAGE>

         5. Expenses. All reasonable expenses incurred by the Company and the
Investors in effecting the registrations provided for in Sections 2 and 3,
including, without limitation, all registration and filing fees, printing
expenses, fees and disbursements of counsel for the Company and one counsel for
the selling stockholders as a group (selected by a majority in interest of the
holders of Registrable Securities who participate in the registration),
underwriting expenses (other than fees, commissions or discounts), expenses of
any audits incident to or required by any such registration and expenses of
complying with the securities or blue sky laws of any jurisdictions pursuant to
Section 4(d) hereof (all of such expenses referred to as "REGISTRATION
EXPENSES"), shall be paid by the Company.

         6. Indemnification.

                  (a) To the maximum extent permitted by law, the Company shall
                  indemnify and hold harmless the selling holder of Registrable
                  Securities, each underwriter (as defined in the Securities
                  Act), and each other Person, if any, who controls (within the
                  meaning of the Securities Act) such selling holder or
                  underwriter (individually and collectively, the "INDEMNIFIED
                  PERSON") against any losses, claims, damages or liabilities
                  (collectively, "LIABILITY"), joint or several, to which such
                  Indemnified Person may become subject under the Securities Act
                  or any other statute or at common law, insofar as such
                  liability (or action in respect thereof) arises out of or is
                  based upon (i) any untrue statement or alleged untrue
                  statement of any material fact contained, on the effective
                  date thereof, in any registration statement under which such
                  securities were registered under the Securities Act, any
                  preliminary prospectus or final prospectus contained therein,
                  or any amendment or supplement thereto, or (ii) 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. Except as otherwise provided in
                  Section 6(e), the Company shall reimburse each such selling
                  holder of Registrable Securities in connection with
                  investigating or defending any such liability as reasonable
                  expenses in connection with the same are incurred; provided,
                  however, that the Company shall not be liable to any such
                  selling holder of Registrable Securities in any such case to
                  the extent that any such liability arises out of or is based
                  upon any untrue statement or alleged untrue statement or
                  omission or alleged omission made in such registration
                  statement, preliminary or final prospectus, or amendment or
                  supplement thereto in reliance upon and in conformity with
                  information furnished in writing to the Company by such
                  selling holder of Registrable Securities specifically for use
                  therein; and provided further, that the Company shall not be
                  required to indemnify any Indemnified Person against any
                  liability arising from any untrue or misleading statement or
                  omission contained in any preliminary prospectus if such
                  deficiency is corrected in the final prospectus or for any
                  liability which arises out of the failure of any Indemnified
                  Person to deliver a prospectus as required by the Securities
                  Act.

                  (b) Each selling holder of any securities included in such
                  registration being effected shall indemnify and hold harmless
                  each other selling holder of any securities, the Company, its
                  directors and officers, each underwriter and each other
                  Person, if any, who controls (within the meaning of the
                  Securities Act) the

                                        8
<PAGE>

                  Company or such underwriter (individually and collectively
                  also the "INDEMNIFIED PERSON"), against any liability, joint
                  or several, to which any such Indemnified Person may become
                  subject under the Securities Act or any other statute or at
                  common law, insofar as such liability (or actions in respect
                  thereof) arises out of or is based upon (i) any untrue
                  statement or alleged untrue statement of any material fact
                  contained, on the effective date thereof, in any registration
                  statement under which securities were registered under the
                  Securities Act at the request of such selling holder, any
                  preliminary prospectus or final prospectus contained therein,
                  or any amendment or supplement thereto, or (ii) any omission
                  or alleged omission by such selling holder to state therein a
                  material fact required to be stated therein or necessary to
                  make the statements therein not misleading, in the case of (i)
                  and (ii) to the extent, but only to the extent, that such
                  untrue statement or alleged untrue statement or omission or
                  alleged omission was made in such registration statement,
                  preliminary or final prospectus, amendment or supplement
                  thereto in reliance upon and in conformity with information
                  furnished in writing to the Company by such selling holder
                  specifically for use therein. Such selling holder shall
                  reimburse any Indemnified Person for any legal fees incurred
                  in investigating or defending any such liability; provided,
                  however, that such selling holder's obligations hereunder
                  shall be limited to an amount equal to the proceeds to such
                  selling holder of the securities sold in any such
                  registration; and provided further, that no selling holder
                  shall be required to indemnify any Person against any
                  liability arising from any untrue or misleading statement or
                  omission contained in any preliminary prospectus if such
                  deficiency is corrected in the final prospectus or for any
                  liability which arises out of the failure of any Person to
                  deliver a prospectus as required by the Securities Act.

                  (c) Indemnification similar to that specified in Sections 6(a)
                  and (b) shall be given by the Company and each selling holder
                  (with such modifications as may be appropriate) with respect
                  to any required registration or other qualification of their
                  securities under any federal or state law or regulation of
                  governmental authority other than the Securities Act.

                  (d) Promptly after receipt by an Indemnified Person under this
                  Section 6 of notice of the commencement of any action
                  (including any governmental action), such Indemnified Person
                  will, if a claim in respect thereof is to be made against any
                  indemnifying party under this Section 6, deliver to the
                  indemnifying party a written notice of the commencement
                  thereof and the indemnifying party will have the right to
                  participate in, and, to the extent the indemnifying party so
                  desires, jointly with any other indemnifying party similarly
                  noticed, to assume the defense thereof with qualified counsel;
                  provided, however, that an Indemnified Person (together with
                  all other Indemnified Persons which may be represented without
                  conflict by one counsel) will have the right to retain one
                  separate counsel, with the reasonable fees and expenses to be
                  paid by the indemnifying party, if representation of such
                  Indemnified Person by the counsel retained by the indemnifying
                  party is inappropriate due to actual or potential differing
                  interests between such Indemnified Person and any other party
                  represented by such counsel in such proceeding. The failure to
                  deliver written notice to the

                                        9
<PAGE>

                  indemnifying party within a reasonable time of the
                  commencement of any such action, if prejudicial to its ability
                  to defend such action, will relieve such indemnifying party of
                  any liability to the Indemnified Person under this Section 6,
                  but the omission so to deliver written notice to the
                  indemnifying party will not relieve it of any liability that
                  it may have to any Indemnified Person otherwise than under
                  this Section 6.

                  (e) If the indemnification provided for in this Section 6 for
                  any reason is held by a court of competent jurisdiction to be
                  unavailable to an Indemnified Person in respect of any losses,
                  claims, damages, expenses or liabilities referred to therein,
                  then each indemnifying party under this Section 6, in lieu of
                  indemnifying such Indemnified Person thereunder, shall
                  contribute to the amount paid or payable by such Indemnified
                  Person as a result of such losses, claims, damages, expenses
                  or liabilities (i) in such proportion as is appropriate to
                  reflect the relative benefits received by the Company, the
                  selling holders and the underwriters from the offering of the
                  Registrable Securities or (ii) if the allocation provided by
                  clause (i) above is not permitted by applicable law, in such
                  proportion as is appropriate to reflect not only the relative
                  benefits referred to in clause (i) above but also the relative
                  fault of the Company, the other selling holders and the
                  underwriters in connection with the statements or omissions
                  which resulted in such losses, claims, damages, expenses or
                  liabilities, as well as any other relevant equitable
                  considerations. The relative benefits received by the Company,
                  the selling holders and the underwriters shall be deemed to be
                  in the same respective proportions that the net proceeds from
                  the offering (before deducting expenses) received by the
                  Company and the selling holders and the underwriting discount
                  received by the underwriters, in each case as set forth in the
                  table on the cover page of the applicable prospectus, bear to
                  the aggregate public offering price of the Registrable
                  Securities. The relative fault of the Company, the selling
                  holders and the underwriters shall be determined by reference
                  to, among other things, whether the untrue or alleged untrue
                  statement of a material fact or the omission or alleged
                  omission to state a material fact relates to information
                  supplied by the Company, the selling holders or the
                  underwriters and the parties' relative intent, knowledge,
                  access to information and opportunity to correct or prevent
                  such statement or omission.

                  (f) The Company, the selling holders and the underwriters
                  agree that it would not be just and equitable if contribution
                  pursuant to this Section 6 were determined by pro rata or per
                  capita allocation or by any other method of allocation which
                  does not take account of the equitable considerations referred
                  to in the immediately preceding paragraph. In no event,
                  however, shall a selling holder be required to contribute any
                  amount under this Section 6(f) in excess of the lesser of (i)
                  that proportion of the total of such losses, claims, damages
                  or liabilities indemnified against equal to the proportion of
                  the total Registrable Securities sold under such registration
                  statement which are being sold by such selling holder or (ii)
                  the proceeds received by such selling holder from its sale of
                  Registrable Securities under such registration statement. No
                  person found guilty of fraudulent misrepresentation (within
                  the meaning of Section 11(f) of the

                                       10
<PAGE>

                  Securities Act) shall be entitled to contribution from any
                  person who was not found guilty of such fraudulent
                  misrepresentation.

                  (g) Notwithstanding the foregoing, to the extent that the
                  provisions on indemnification and contribution contained in
                  the 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.

         7. Compliance with Rule 144.

                  (a) The Company will use its best efforts to file with the
                  Commission such information as is required under the Exchange
                  Act for so long as there are holders of Registrable
                  Securities; and in such event, the Company shall use its best
                  efforts to take all action as may be required as a condition
                  to the availability of Rule 144. The Company shall furnish to
                  any holder of Registrable Securities upon reasonable request a
                  written statement executed by the Company as to the steps it
                  has taken to comply with the current public information
                  requirement of Rule 144. Subject to the limitations on
                  transfers imposed by this Agreement, the Company shall use its
                  reasonable best efforts to facilitate and expedite transfers
                  of Registrable Securities pursuant to Rule 144, which efforts
                  shall include timely notice to its transfer agent to expedite
                  such transfers of Registrable Securities.

                  (b) Except with respect to a demand registration pursuant to
                  Section 2, prior to the Company's registration of any
                  Registrable Securities hereunder on behalf of an Investor,
                  such Investor shall (i) use its reasonable best efforts to
                  sell the maximum number of Registrable Securities that such
                  Investor is able to sell pursuant to Rule 144 and (ii)
                  exercise the registration rights hereunder only in the case
                  that such Investor determines in good faith that such rights
                  are necessary to sell such Registrable Securities in a timely
                  manner.

         8. Amendments. The provisions of this Agreement may be amended, and the
Company may take any action herein prohibited or omit to perform any act herein
required to be performed by it, only with the written consent of the Company and
Investors holding a majority of the Registrable Securities.

         9. Transferability of Registration Rights. The Registration Rights set
forth in this Agreement are transferable to each valid and proper transferee of
at least Five Hundred Seventy Five Thousand (575,000) shares of Registrable
Securities. Each such transferee of Registrable Securities must consent in
writing to be bound by the terms and conditions of this Agreement in order to
acquire the rights granted pursuant to this Agreement.

         10. Rights Which May Be Granted to Subsequent Investors. Other than
transferees of Registrable Securities under Section 9 hereof, the Company shall
not, without the prior written consent of a Majority Interest of the Investors,
(a) allow purchasers of the Company's securities to become a party to this
Agreement or (b) grant any other registration rights to any third parties other
than subordinate piggyback registration rights.

                                       11
<PAGE>

         11. Damages. The Company recognizes and agrees that each holder of
Registrable Securities will not have an adequate remedy if the Company fails to
comply with the terms and provisions of this Agreement and that damages will not
be readily ascertainable, and the Company expressly agrees that, in the event of
such failure, it shall not oppose an application by any holder of Registrable
Securities or any other Person entitled to the benefits of this Agreement
requiring specific performance of any and all provisions hereof or enjoining the
Company from continuing to commit any such breach of this Agreement.

         12. Miscellaneous.

                  (a) All notices, requests, demands and other communications
                  provided for hereunder shall be in writing and mailed (by
                  first class registered or certified mail, postage prepaid),
                  telegraphed, sent by express overnight courier service or
                  electronic facsimile transmission (with a copy by mail), or
                  delivered to the applicable party at the addresses indicated
                  below:

                           If to the Company:    WebSideStory, Inc.
                                                 10182 Telesis Court, 6th Floor
                                                 San Diego, CA  92121
                                                 Facsimile: (858) 546-0400
                                                 Attn: General Counsel

                           If to the Investors: At such Person's address listed
                           opposite their name on Schedule A attached hereto.

                           If to Avivo Investors: At such Person's address
                           listed opposite their name on Schedule B attached
                           hereto.

                  or, as to each of the foregoing, at such other address as
                  shall be designated by such Person in a written notice to
                  other parties complying as to delivery with the terms of this
                  subsection (a). All such notices, requests, demands and other
                  communications shall, when mailed, telegraphed or sent,
                  respectively, be effective (i) two days after being deposited
                  in the mails or (ii) one day after being delivered to the
                  telegraph company, deposited with the express overnight
                  courier service or sent by electronic facsimile transmission,
                  respectively, addressed as aforesaid.

                  (b) This Agreement shall be governed by and construed in
                  accordance with the laws of the State of California, without
                  giving effect to conflict of laws principles thereof.

                  (c) This Agreement may be executed in two or more
                  counterparts, each of which shall be deemed an original, but
                  all of which together shall constitute one and the same
                  instrument.

                  (d) If any provision of this Agreement shall be held to be
                  illegal, invalid or unenforceable, such illegality, invalidity
                  or unenforceability shall attach only to

                                       12
<PAGE>

                  such provision and shall not in any manner affect or render
                  illegal, invalid or unenforceable any other provision of this
                  Agreement, and this Agreement shall be carried out as if any
                  such illegal, invalid or unenforceable provision were not
                  contained herein.

         13. Dispute Resolution. Except as provided below, any dispute arising
out of or relating to this Agreement or the breach, termination or validity
hereof shall be finally settled by binding arbitration conducted expeditiously
by one arbitrator in accordance with the J.A.M.S./Endispute Streamlined
Arbitration Rules and Procedures (the "J.A.M.S. RULES"). The arbitration shall
be governed by the United States Arbitration Act, 9 U.S.C. Sections 1-16, and
judgment upon the award rendered by the arbitrator may be entered by any court
having jurisdiction thereof. The place of arbitration shall be San Diego,
California.

         Such proceedings shall be administered by the arbitrator in accordance
with the J.A.M.S. Rules as he/she deems appropriate, however, such proceedings
shall be conducted in accordance with the following agreed upon procedures:

                  (a) mandatory exchange of all relevant documents, to be
                  accomplished within forty-five (45) days of the initiation of
                  the procedure (documents not so exchanged will be excluded
                  from the evidence considered at the hearing absent a showing
                  of good cause);

                  (b) no other discovery;

                  (c) hearings before the arbitrator which shall consist of a
                  summary presentation by each side of not more than three (3)
                  hours; such hearings to take place on one or two days at a
                  maximum; and

                  (d) decision to be rendered not more than ten (10) days
                  following such hearings.

         Notwithstanding anything to the contrary contained herein, the
provisions of this Section 13 shall not apply with regard to any equitable
remedies to which any party may be entitled hereunder.

         Each of the parties hereto (x) hereby irrevocably submits to the
personal jurisdiction of any court of competent jurisdiction in the United
States for the purpose of enforcing the award or decision in any such
proceeding, (y) hereby waives, and agrees not to assert, by way of motion, as a
defense, or otherwise, in any such suit, action or proceeding, any claim that it
is not subject personally to the jurisdiction of the above-named courts, that
its property is exempt or immune from attachment or execution (except as
protected by applicable law), that the suit, action or proceeding is brought in
an inconvenient forum, that the venue of the suit, action or proceeding is
improper or that this Agreement or the subject matter hereof may not be enforced
in or by such court, and hereby waives and agrees not to seek any review by any
court of any other jurisdiction which may be called upon to grant an enforcement
of the judgment of any such court. Each of the parties hereto hereby consents to
service of process by registered mail at the address to which notices are to be
given. Each of the parties hereto agrees that its or his submission to
jurisdiction and its or his consent to service of process by mail is made for
the express benefit of the other

                                       13
<PAGE>

parties hereto. Final judgment against any party hereto in any such action, suit
or proceeding may be enforced in other jurisdictions by suit, action or
proceeding on the judgment, or in any other manner provided by or pursuant to
the laws of such other jurisdiction.

             [The remainder of this page intentionally left blank.]

                                       14
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "COMPANY"

                                WEBSIDESTORY, INC.

                                ___________________________________
                                Jeffrey W. Lunsford
                                President, Chief Executive Officer
                                and Chairman

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "EXISTING INVESTOR"

                                TA/ADVENT VIII L.P.

                                By: TA Associates VIII LLC, its General Partner
                                By: TA Associates, Inc., its Manager

                                By:           *
                                   -------------------------------

                                ADVENT ATLANTIC AND PACIFIC III L.P.

                                By: TA Associates AAP III Partners,
                                    its General Partner

                                By: TA Associates, Inc., its General Partner

                                By:           *
                                   -------------------------------

                                TA INVESTORS LLC

                                By:  TA Associates, Inc., its Manager

                                By:           *
*By:_______________________        -------------------------------
         Kurt R. Jaggers
         Managing Director
                                TA EXECUTIVES FUND LLC

                                By: TA Associates, Inc., its Manager

                                By:           *
                                   -------------------------------

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "EXISTING INVESTOR"

                                SUMMIT INVESTORS III, L.P.

                                By:           *
                                   -------------------------------
                                General Partner

                                SUMMIT V ADVISORS FUND (QP), L.P.
                                By: Summit Partners V, L.P., its General Partner
                                By: Summit Partners, LLC, its General Partner

                                By:           *
                                   -------------------------------

                                SUMMIT V ADVISORS FUND, L.P.
                                By: Summit Partners V, L.P., its General Partner
                                By: Summit Partners, LLC, its General Partner

                                By:           *
                                   -------------------------------
*By:_______________________
     Walter G. Kortschak
     Managing Director

                                SUMMIT V COMPANION FUND, L.P.
                                By: Summit Partners V, L.P., its General Partner
                                By: Summit Partners, LLC, its General Partner

                                By:           *
                                   -------------------------------

                                SUMMIT VENTURES V, L.P.
                                By: Summit Partners V, L.P., its General Partner
                                By: Summit Partners, LLC, its General Partner

                                By:           *
                                   -------------------------------

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "EXISTING INVESTOR"

                                WESTCLIFF PARTNERS, LP.
                                By: Westcliff Capital Management, LLC,
                                    its General Partner

                                By:           *
                                   -------------------------------

                                WESTCLIFF AGGRESSIVE GROWTH, LP.
                                By: Westcliff Capital Management, LLC,
                                    its General Partner

                                By:           *
                                   -------------------------------

                                WESTCLIFF LONG/SHORT, LP.
                                By: Westcliff Capital Management, LLC,
                                    its General Partner

                                By:           *
*By:_____________________          -------------------------------
         Richard Spencer
         General Partner

                                WESTCLIFF MASTER FUND, LP.
                                By: Westcliff Capital Management, LLC,
                                    its General Partner

                                By:           *
                                   -------------------------------

                                PALM TRUST
                                By: Westcliff Capital Management, LLC,
                                    its Investment Advisor

                                By:           *
                                   -------------------------------

                                WESTCLIFF PROFIT SHARING PLAN

                                By: Westcliff Capital Management, LLC,
                                    its General Partner

                                By:           *
                                   -------------------------------

                                WESTCLIFF SMALL CAP FUND, LP.

                                By: Westcliff Capital Management, LLC,
                                    its General Partner

                                By:           *
                                   -------------------------------

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "EXISTING INVESTOR"

                                PENINSULA FUND L.P.

                                By:_______________________
                                Scott Bedford
                                President

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "EXISTING INVESTOR"

                                _________________________
                                John Hentrich

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "EXISTING INVESTOR"

                                _______________________
                                Keith Fisher

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "AVIVO INVESTOR"

                                NEW ENTERPRISE ASSOCIATES 10, L.P.

                                By:_______________________
                                Name:
                                Title:

                                NEA VENTURES 2000, L.P.

                                By:_______________________
                                Name:
                                Title:

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "AVIVO INVESTOR"

                                SOFINNOVA VENTURE PARTNERS IV, L.P.

                                By:_______________________
                                Name:
                                Title:

                                SOFINNOVA VENTURE AFFILIATES IV, L.P.

                                By:_______________________
                                Name:
                                Title:

                                SOFINNOVA CAPITAL III

                                By:_______________________
                                Name:
                                Title:

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "AVIVO INVESTOR"

                                _______________________
                                Steven R. Kusmer

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "AVIVO INVESTOR"

                                _______________________
                                Chip Linehan

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "AVIVO INVESTOR"

                                ________________________
                                Michael P. Thompson

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the date first set forth above.

                                "AVIVO INVESTOR"

                                _______________________
                                Kevin G. Wallace

                     [SIGNATURE PAGE TO AMENDED AND RESTATED
                         REGISTRATION RIGHTS AGREEMENT]

<PAGE>

                                   SCHEDULE A

                               EXISTING INVESTORS

<TABLE>
<CAPTION>
               NAME                                            ADDRESS
               ----                                            -------
<S>                                                            <C>
JOHN HENTRICH
KEITH FISHER
TA/ADVENT VIII L.P.
ADVENT ATLANTIC AND PACIFIC III L.P.
TA INVESTORS LLC
TA EXECUTIVES FUND LLC
SUMMIT INVESTORS III, L.P.
SUMMIT V ADVISORS FUND (QP), L.P.
SUMMIT V ADVISORS FUND, L.P.
SUMMIT V COMPANION FUND, L.P.
SUMMIT VENTURES V, L.P.
WESTCLIFF PARTNERS, LP.
WESTCLIFF AGGRESSIVE GROWTH, LP.
WESTCLIFF LONG/SHORT, LP.
WESTCLIFF MASTER FUND, LP.
PALM TRUST
WESTCLIFF PROFIT SHARING PLAN
WESTCLIFF SMALL CAP FUND, LP.
PENINSULA FUND L.P.
</TABLE>

<PAGE>

                                   SCHEDULE B

                                 AVIVO INVESTORS

<TABLE>
<CAPTION>
               NAME                                            ADDRESS
               ----                                            -------
<S>                                                            <C>
NEW ENTERPRISE ASSOCIATES 10, L.P.
NEA Ventures 2000, L.P.
SOFINNOVA VENTURE PARTNERS IV, L.P.
SOFINNOVA VENTURE AFFILIATES IV, .L.P.
SOFINNOVA CAPITAL III
STEVEN R. KUSMER
CHIP LINEHAN
MICHAEL P. THOMPSON
KEVIN G. WALLACE
</TABLE>

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