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                                                                     EXHIBIT 4.2

                            INVESTOR RIGHTS AGREEMENT

          This INVESTOR RIGHTS AGREEMENT (this "Agreement"), is entered into as
of March 28, 2002, by and among Centiv, Inc., a Georgia corporation (the
"Company"), and the undersigned investors who are signatories to this Agreement
(together with any permitted transferees or assigns or any additional investors
who become party to this Agreement pursuant to Section 11.2 hereof, the
"Investors").

                                   BACKGROUND

          A. The Company and the Investors have entered into a Securities
Purchase Agreement dated the same date as this Agreement (the "Securities
Purchase Agreement"). Pursuant to the Securities Purchase Agreement, the Company
has agreed to issue and sell to the Investors (i) shares of the Company's Series
A Convertible Preferred, par value $.001 per share (the "Preferred Stock"), and
(ii) warrants to purchase Preferred Stock (the "Warrants"). The shares of
Preferred Stock are convertible into shares of the Company's Class A Common
Stock, $.001 per share ("Common Stock").

          B. To induce the Investors to purchase the Shares and the Warrants,
the Company has agreed to provide certain registration rights under the
Securities Act of 1933, as amended (such act, together with the rules and
regulations thereunder, or any similar successor statute, the "Securities Act"),
and applicable state securities laws.

NOW, THEREFORE, the Company and the Investors hereby agree as follows:

1. DEFINITIONS.

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

          1.1 "BENEFICIALLY OWNED" with respect to an Investor or group of
Investors includes all Registrable Securities then held by such Investor or
group of Investors plus all Registrable Securities acquirable by such Investor
or group of Investors upon conversion of Preferred Stock or exercise of Warrants
(and, if applicable, conversion of Preferred Stock issuable upon exercise of
Warrants).

          1.2 "BUSINESS DAY" means any day other than a Saturday or Sunday or a
day on which banking institutions in the State of California are authorized or
obligated by law, regulation or executive order to close.

          1.3 "CLOSING DATE" shall have the meaning set forth in Section 2.2 of
the Securities Purchase Agreement.

          1.4 "CONVERSION SHARES" shall mean the shares of Common Stock issuable
upon conversion of the Preferred Stock (including Preferred Stock issued or
issuable upon exercise of the Warrants).

          1.5 "PRO RATA PERCENTAGE" shall mean, with respect to any Investor as
of a particular time, a percentage computed by dividing (a) the number of
Registrable Securities Beneficially Owned by such Investor, by (b) the number of
shares of Common Stock and Preferred Stock issued and outstanding plus the
number of Warrant Common Shares issuable upon exercise of Warrants outstanding
(all on an as-converted basis).

         1.6 "REGISTER," "REGISTERED," and "REGISTRATION" refer to a
registration effected by preparing and filing a Registration Statement or
Statements in compliance with the Securities Act, and the declaration or
ordering of effectiveness of such Registration Statement by the SEC.

          1.7 "REGISTRABLE SECURITIES" means (i) the Conversion Shares, (ii) the
Warrant Common Shares, (iii) any shares of Common Stock issued to an Investor in
lieu of any cash compensation payment pursuant

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to Section 2.3 of this Agreement and (iv) any shares of capital stock issued or
issuable, from time to time (with any adjustments), as a distribution on or in
exchange for or otherwise with respect to any of the foregoing or the Shares.

          1.8 "REGISTRATION STATEMENT" means one or more registration statements
of the Company under the Securities Act.

          1.9 "SEC" means the United States Securities and Exchange Commission.

          1.10 "SHARES" shall mean the shares of Preferred Stock issued on the
Closing Date.

          1.11 "WARRANT COMMON SHARES" shall mean shares of Common Stock
issuable directly upon exercise of or otherwise pursuant to the Warrants.

2. REGISTRATION.

          2.1 MANDATORY REGISTRATION STATEMENT FILING. The Company shall file
with the SEC, on or prior to the date which is thirty (30) calendar days after
the Closing Date (the "Filing Deadline") a Registration Statement on Form S-3
pursuant to Rule 415 under the Securities Act (such rule or any successor
thereto, "Rule 415") covering the resale by the Investors of up to 4,320,000
shares of Common Stock (which includes all Conversion Shares and Warrant Common
Shares), and the shares of Common Stock issuable under the stock option
referenced in Section 3.18, which Registration Statement, to the extent
allowable under the Securities Act and the Rules promulgated thereunder shall
state that such Registration Statement also covers such indeterminate number of
additional shares of Common Stock as may become issuable upon conversion of the
Preferred Stock or exercise of the Warrants or options to prevent dilution
resulting from stock splits, stock dividends or similar transactions (the
"Initial Registration Statement"). The Initial Registration Statement shall be
provided to (and subject to the review by) the Investors and their counsel at
least five (5) business days prior to its filing or other submission.

          2.2 UNDERWRITTEN OFFERING. The Investors may offer and sell the
Registrable Securities pursuant to a Registration Statement filed in accordance
with Section 2.1 in an underwritten offering. In any such underwritten offering,
the Investors who Beneficially Own a majority in interest of the Registrable
Securities subject to such underwritten offering, shall have the right to select
one legal counsel to represent the Investors and an investment banker or bankers
and manager or managers to administer the offering, which investment banker or
bankers or manager or managers shall be reasonably satisfactory to the Company.
In the event that any Investors elect not to participate in such underwritten
offering, the Registration Statement covering all of the Registrable Securities
shall contain appropriate plans of distribution reasonably satisfactory to the
Investors participating in such underwritten offering and the Investors electing
not to participate in such underwritten offering (including, without limitation,
the ability of nonparticipating Investors to sell from time to time and at any
time during the effectiveness of such Registration Statement).

          2.3 REGISTRATION DEADLINE; PAYMENTS BY THE COMPANY.

          (a) The Company shall use its best efforts to cause the Initial
Registration to become effective as soon as practicable, but in no event later
than the ninetieth (90th) day after the Closing Date (the "Registration
Deadline"). If (A) the Initial Registration Statement is not filed with the SEC
by the Filing Deadline, (B) the Initial Registration Statement is not declared
effective by the SEC on or before the Registration Deadline, or (C) after the
Initial Registration Statement has been declared effective by the SEC, sales of
the Registrable Securities required to be included therein cannot be made
pursuant to the Registration Statement because such Registration Statement
ceases to be effective under the Securities Act or the Company informs the
Investors under Section 3.5 or otherwise that they should not use the
Registration Statement for sales of Registrable Securities (each a "Registration
Suspension"), then the Company will, subject to Section 2.3(c) below, make
payments to the Investors in such amounts and at such times as shall be
determined pursuant to this Section 2.3 as compensation for the damages to the
Investors by reason of any such delay in or reduction of their ability to sell
the Registrable Securities

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(which remedy shall not be exclusive of any other remedies available to obtain
specific performance by the Company of its obligations hereunder, but shall be
exclusive of any actions for damages relating to the failure by the Company
after exercising its best efforts to obtain or maintain the effectiveness of any
particular registration statement).

          (b) In the event the compensation provisions of Section 2.3(a) are
triggered, the Company shall pay to each Investor an amount equal to (A) the
amount paid by such Investor for the Shares and Warrants purchased by such
Investor (or if such Investor is not the original purchaser of such securities,
the amount paid by the original purchaser thereof), multiplied by (B) one
percent, multiplied by (C) the number of days after the Filing Deadline and
prior to the date the Initial Registration Statement is filed with the SEC, plus
the number of days after the Registration Deadline and prior to the date the
Registration Statement is declared effective by the SEC plus, in the event of a
Registration Suspension, except with respect to any Blackout Period (as defined
below), the number of additional days that sales of any Registrable Securities
required to be included in a Registration Statement cannot be made pursuant to a
Registration Statement after such Registration Statement has been declared
effective, divided by (D) thirty.

          (c) Notwithstanding the foregoing, a Registration Suspension during a
Blackout Period (as defined below) shall not give rise to an obligation to make
a payment under this Section 2.3. For purposes of this Agreement, "Blackout
Period" shall mean such day or days, not to exceed an aggregate of twenty-five
(25) business days during any period of twelve (12) consecutive months, with
respect to which the Board of Directors of the Company determines in good faith
(A) that an amendment or supplement to a Registration Statement or prospectus
contained therein is necessary in light of subsequent events, in order to
correct a material misstatement made therein or to include information the
absence of which would render the Registration Statement or such prospectus
materially misleading and (B) that the filing of such amendment or supplement
would result in the disclosure of information which the Company has a bona fide
business purpose for preserving as confidential; provided that the Company shall
be entitled to impose no more than four (4) Blackout Periods during any period
of twelve (12) consecutive months and the Company shall notify the Investors
immediately upon imposition of any Blackout Period.

          (d) Amounts payable under this Section 2.3 shall at the option of the
Company either be paid (i) in cash, or (b) in shares of Common Stock, valuing
the Common Stock at a price equal to the closing price of the shares of Common
Stock on the Nasdaq Stock Market ("Nasdaq") on the trading day immediately prior
to the date such shares are issued (or such other method of valuation as agreed
by the Company and such Investor) , and any shares of Common Stock so issued
shall be Registrable Securities (provided that the failure of such shares to be
registered at the time of payment shall not preclude the Company from using such
shares for payment of its obligations under this Section 2.3). Payments under
this Section 2.3 shall be made within five (5) days after the end of each period
that gives rise to such obligation, provided that, if any such period extends
for more than thirty (30) days, interim payments shall be made for such thirty
(30) day period. If such payment is not made within the applicable period, the
Investor thereafter shall be entitled to additional compensation on the unpaid
amount at a rate equal of two percent (2%) per month until such amount is paid
in full to the Investor. If the Company decides to make payment partially in
cash and partially in stock, , the Company will pay the Investors such cash
amounts and share amounts pro rata based upon the total amounts payable to each
Investor as a percentage of the total amounts payable to all Investors.

          2.4 ELIGIBILITY FOR FORM S-3. The Company represents and warrants that
it is eligible to register the resale of Registrable Securities on a
registration statement on Form S-3 under Rule 415 under the Securities Act. To
the Company's knowledge, after reasonable investigation, there exist no facts or
circumstances (including without limitation any required approvals or waivers or
any circumstances that may delay or prevent the obtaining of accountant's
consents) that would prohibit or delay the preparation and filing of a
registration statement on Form S-3 with respect to the Registrable Securities.
The Company shall file all reports required to be filed by the Company with the
SEC in a timely manner so as to maintain its eligibility for the use of Form
S-3.

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          2.5 PIGGY-BACK RIGHTS.

          (a) If at any time the Company proposes to register any of its stock
or other securities under the Securities Act (including for this purpose a
registration effected by the Company for shareholders other than the Investors,
but excluding a registration on Form S-8 relating solely to the sale of
securities to participants in a Company stock or stock option plan or to other
compensatory arrangements to the extent includible on Form S-8, or a
registration on Form S-4), the Company shall, at such time, promptly give each
Investor written notice of such registration. Upon the written request of any
Investor given within ten (10) days after receipt by such Investor of such
notice by the Company in accordance with Section 13.2, the Company shall,
subject to Section 2.5(b), use its best efforts to cause to be registered under
the Securities Act all of the Registrable Securities that such Investor has
requested to be registered. The Company shall have no obligation under this
Section 2.5 to make any offering of its securities, or to complete an offering
of its securities that it proposes to make, and shall incur no liability to any
Investor for its failure to do so. No registration effected under this Section
2.5 shall relieve the Company of any of its obligations to effect registration
under Section 2.1.

          (b) In connection with any offering involving an underwriting of
shares being issued by the Company, the Company shall not be required under
Section 2.5 to include any Investor's securities in such underwriting unless
such Investor accepts the terms of the underwriting as agreed upon between the
Company and the underwriters selected by the Company, and then only in such
quantity as will not, in the opinion of the underwriters, jeopardize the success
of the offering by the Company; provided, however, that no Investor
participating in such underwriting shall be required to make any
representations, warranties or indemnities in their capacity as selling
stockholders except as they relate to such Investor's ownership of shares and
authority to enter into the underwriting agreement and such Investor's intended
method of distribution. If the total amount of securities, including Registrable
Securities, requested by shareholders to be included in any offering referred to
in Section 2.5 exceeds the amount of securities sold other than by the Company
that the underwriters reasonably believe compatible with the success of the
offering, then the Company shall be required to include in the offering only
that number of such securities, including Registrable Securities, which the
underwriters believe will not jeopardize the success of the offering. The
securities so included shall be apportioned pro rata among the selling
shareholders.

3. OBLIGATIONS OF THE COMPANY.

          In connection with the registration of the Registrable Securities, the
Company shall have the following obligations:

          3.1 PREPARATION, FILING AND EFFECTIVENESS OF REGISTRATION STATEMENT.
The Company shall prepare and file with the SEC on or before the Filing Deadline
the Initial Registration Statement and shall use its best efforts to cause such
Registration Statement to become effective as soon as practicable after such
filing (but in no event later than the Registration Deadline). The Company shall
keep such Registration Statement effective pursuant to Rule 415 at all times
until the earliest of (a) six years from the date of this Agreement, (b) the
date on which all of the Registrable Securities (in the reasonable opinion of
counsel to the Investors or the Company) may be immediately sold to the public
in a single transaction pursuant to Rule 144(k) under the Securities Act or
otherwise without registration or restriction, including Registrable Securities
issuable upon exercise of the Warrants (the "Registration Period"), (c) two
years after all of the Warrants have been either redeemed or exercised, or (d)
two years after all of the outstanding shares of Preferred Stock have been
converted into Common Stock; provided, that in the case of a termination of the
effectiveness of the Registration Statement under clauses (b), (c) or (d), the
Company shall provide notice to the Investors ninety (90) days prior to the date
on which the Registration Statement shall cease to be effective . Each
Registration Statement filed under this Agreement (including any amendments or
supplements thereto and prospectuses contained therein and all documents
incorporated by reference therein) (i) shall comply in all material respects
with the requirements of the Securities Act and the rules and regulations of the
SEC promulgated thereunder and (ii) shall not contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein, or
necessary to make the statements therein not misleading. The financial
statements of the Company included in the Registration Statement or incorporated
by reference therein will comply as to form in all material respects with

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applicable accounting requirements and the published rules and regulations of
the SEC applicable with respect thereto. Such financial statements will be
prepared in accordance with U.S. generally accepted accounting principles,
consistently applied, during the periods involved (except (i) as may be
otherwise indicated in such financial statements or the notes thereto, or (ii)
in the case of unaudited interim statements, to the extent they may not include
footnotes or may be condensed on summary statements and fairly present in all
material respects the consolidated financial position of the Company and its
consolidated subsidiaries as of the dates thereof and the consolidated results
of their operations and cash flows for the periods then ended (subject, in the
case of unaudited statements, to normal year-end adjustments)).

          3.2 AMENDMENTS AND SUPPLEMENTS. The Company shall prepare and file
with the SEC such amendments (including post-effective amendments) and
supplements to the Initial Registration Statement and the prospectus used in
connection with the Initial Registration Statement as may be necessary to keep
the Initial Registration Statement effective at all times during the
Registration Period, and, during such period, comply with the provisions of the
Securities Act with respect to the disposition of all Registrable Securities of
the Company covered by the Initial Registration Statement until such time as all
of such Registrable Securities have been disposed of in accordance with the
intended methods of disposition by the seller or sellers thereof as set forth in
the Initial Registration Statement. If for any reason the number of shares
registered under the Initial Registration Statement filed pursuant to this
Agreement is, for any three (3) consecutive trading days (the last of such three
(3) trading days being the "Registration Trigger Date"), insufficient to cover
one hundred percent (100%) of the Registrable Securities (including Registrable
Securities issuable upon exercise of the Warrants or upon conversion of the
Preferred Stock), the Company shall amend the Initial Registration Statement, or
file a new Registration Statement (on the shortest form available therefor, if
applicable), or both, so as to cover one hundred percent (100%) of the
Registrable Securities (including Registrable Securities issuable upon exercise
of the Warrants or upon conversion of the Preferred Stock) as of the
Registration Trigger Date, in each case, as soon as practicable, but in any
event within ten (10) days after the Registration Trigger Date. The Company
shall use its best efforts to cause such amendment and/or new Registration
Statement to become effective as soon as practicable following the filing
thereof. Any failure by the Company to effectuate the provisions of this Section
shall result in the accrual of compensatory damages as set forth in Section 2.3.

          3.3 FURNISHING MATERIALS TO INVESTORS. The Company shall furnish to
each Investor whose Registrable Securities are included in a Registration
Statement and its legal counsel promptly after the same is prepared and publicly
distributed, filed with the SEC, or received by the Company, one copy of the
Registration Statement and any amendment thereto, each preliminary prospectus
and prospectus and each amendment or supplement thereto. In addition, in the
case of the Initial Registration Statement, the Company shall promptly furnish
to the Investors (i) all correspondence received from the SEC relating to that
Registration Statement and, within at least two days prior to the date of
submission, a copy of each letter written by or on behalf of the Company to the
SEC, and the Company shall cooperate in making all reasonable modifications
requested by the Investors to any portion of any letter or other correspondence
from the Company to the SEC that relates to the Investors or transactions
contemplated by agreements between the Company and any investors, (ii) on the
date of effectiveness of the Registration Statement or any amendment thereto, a
notice stating that the Registration Statement or amendment has been declared
effective, and (iii) such number of copies of a prospectus, including a
preliminary prospectus, and all amendments and supplements thereto and such
other documents as an Investor may reasonably request in order to facilitate the
disposition of the Registrable Securities owned by such Investor.

          3.4 UNDERWRITTEN OFFERING. In the event the Investors who Beneficially
Own a majority in interest of the Registrable Securities being offered in an
offering select underwriters for the offering, the Company shall enter into and
perform its obligations under an underwriting agreement, in usual and customary
form, including, without limitation, customary indemnification and contribution
obligations, with the underwriters of such offering.

          3.5 NOTIFICATION OF EVENTS. As promptly as practicable after becoming
aware of such event, the Company shall notify each Investor by telephone and
facsimile of the happening of any event, of which the Company has knowledge, as
a result of which the prospectus included in the Registration Statement, as

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then in effect, includes an untrue statement of a material fact or omits to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading, and, except during a Blackout Period, use its
best efforts promptly to prepare a supplement or amendment to the Registration
Statement to correct such untrue statement or omission and deliver such number
of copies of such supplement or amendment to each Investor as such Investor may
reasonably request.

          3.6 STOP ORDERS OR OTHER SUSPENSIONS OF EFFECTIVENESS. The Company
shall use its best efforts to prevent the issuance of any stop order or other
suspension of effectiveness of a Registration Statement, and, if such an order
is issued, to obtain the withdrawal of such order at the earliest practicable
date (including in each case by amending or supplementing such Registration
Statement) and to notify each Investor who holds Registrable Securities being
sold (or, in the event of an underwritten offering, the managing underwriters)
of the issuance of such order and the resolution thereof (and if such
Registration Statement is supplemented or amended, deliver such number of copies
of such supplement or amendment to each Investor as such Investor may reasonably
request).

          3.7 REVIEW BY COUNSEL. The Company shall provide to a single counsel
designated by the Investors a copy for review of any Registration Statement and
all amendments and supplements thereto at least two (2) business days prior to
their filing with the SEC, except for the Initial Registration Statement which
shall be provided at least five business days in advance pursuant to Section 2.1
hereof.

          3.8 EARNINGS STATEMENT. The Company shall make generally available to
its security holders as soon as practical, but not later than ninety (90) days
after the close of the period covered thereby, an earnings statement (in form
complying with the provisions of Rule 158 under the Securities Act) covering a
twelve-month period beginning not later than the first day of the Company's
fiscal quarter next following the effective date of the Registration Statement.

          3.9 OPINION AND COMFORT LETTERS. At the request of any Investor whose
Registrable Securities are included in a Registration Statement relating to an
underwritten offering, the Company shall furnish, on the date of effectiveness
of the Registration Statement (i) an opinion, dated as of such date, from
counsel representing the Company addressed to the Investors and underwriters in
form, scope and substance as is customarily given in an underwritten public
offering and (ii) a letter, dated such date, from the Company's independent
certified public accountants in form and substance as is customarily given by
independent certified public accountants to underwriters in an underwritten
public offering, addressed to the Investors and the underwriters.

          3.10 DUE DILIGENCE INSPECTION.The Company shall make available for
inspection by (i) any Investor whose Registrable Securities are included in a
Registration Statement, (ii) any underwriter participating in any disposition
pursuant to a Registration Statement, (iii) one firm of attorneys and one firm
of accountants or other agents retained by the Investors, and (iv) one firm of
attorneys retained by the underwriters (collectively, the "Inspectors") all
pertinent financial and other records, and pertinent corporate documents and
properties of the Company, as shall be reasonably deemed necessary by each
Inspector to enable each Inspector to exercise its due diligence responsibility,
and cause the Company's officers, directors and employees to supply all
information which any Inspector may reasonably request for purposes of such due
diligence, provided, however, that each such Inspector shall, if reasonably
requested to do so by the Company, be required to execute a confidentiality
agreement in form and substance reasonably acceptable to such Inspector and the
Company.

          3.11 CONFIDENTIALITY.The Company shall hold in confidence and not make
any disclosure of information concerning an Investor provided to the Company
unless (i) disclosure of such information is necessary to comply with federal or
state securities laws, (ii) the disclosure of such information is necessary to
avoid or correct a misstatement or omission in any Registration Statement, (iii)
the release of such information is ordered pursuant to a subpoena or other order
from a court or governmental body of competent jurisdiction, (iv) such
information has been made generally available to the public other than by
disclosure in violation of this or any other agreement, or (v) such Investor
consents to the form and content of any such disclosure. The Company agrees that
it shall, upon learning that disclosure of such information

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concerning an Investor is sought in or by a court or governmental body of
competent jurisdiction or through other means, give prompt notice to such
Investor prior to making such disclosure, and allow the Investor, at its
expense, to undertake appropriate action to prevent disclosure of, or to obtain
a protective order for, such information.

          3.12 LISTING.The Company shall use its best efforts to promptly either
(i) secure the designation and quotation, of all the Registrable Securities
covered by the Registration Statement on Nasdaq, and, without limiting the
generality of the foregoing, to arrange for or maintain at least two market
makers to register with the National Association of Securities Dealers, Inc. as
such with respect to such Registrable Securities; or (ii) cause all the
Registrable Securities covered by the Registration Statement to be listed on the
New York Stock Exchange, American Stock Exchange or another national securities
exchange and on each additional national securities exchange on which securities
of the same class or series issued by the Company are then listed, if any, if
the listing of such Registrable Securities is then permitted under the rules of
such exchange

          3.13 TRANSFER AGENT AND REGISTRAR. The Company shall provide a
transfer agent and registrar, which may be a single entity, for the Registrable
Securities not later than the effective date of the Registration Statement.

          3.14 DELIVERY OF CERTIFICATES. The Company shall cooperate with the
Investors who hold Registrable Securities being offered and the managing
underwriter or underwriters, if any, to facilitate the timely preparation and
delivery of certificates (not bearing any restrictive legends) representing
Registrable Securities to be offered pursuant to the Registration Statement and
enable such certificates to be in such denominations or amounts, as the case may
be, as the managing underwriter or underwriters, if any, or the Investors may
reasonably request and registered in such names as the managing underwriter or
underwriters, if any, or the Investors may request, and, within three (3)
business days after a Registration Statement which includes Registrable
Securities is ordered effective by the SEC, the Company shall deliver, and shall
cause legal counsel selected by the Company to deliver, to the transfer agent
for the Registrable Securities (with copies to the Investors whose Registrable
Securities are included in such Registration Statement) an opinion of such
counsel in the form attached hereto as Exhibit 1.

          3.15 PLAN OF DISTRIBUTION. Following effectiveness of the Initial
Registration Statement, at the request of Investors who Beneficially Own a
majority-in-interest of the Registrable Securities, the Company shall prepare
and file with the SEC such amendments (including post-effective amendments) or
supplements to a Registration Statement and the prospectus used in connection
with the Registration Statement as may be necessary in order to change the plan
of distribution set forth in such Registration Statement; provided, however,
that in the event that the Company files an amendment at the request of the
Investors pursuant to this paragraph and the SEC reviews such amendment, then
the Company shall not be responsible for any compensation under Section 2.3 from
any resulting Registration Suspension arising solely from said review so long as
the Company uses its best efforts to have the Registration Statement declared
effective as soon as practicable following such Registration Suspension.

          3.16 COMPLIANCE WITH LAWS. The Company shall comply with all
applicable laws related to a Registration Statement and offering and sale of
securities and all applicable rules and regulations of governmental authorities
in connection therewith (including without limitation the Securities Act and the
Securities Exchange Act of 1934, as amended, and the rules and regulations
promulgated by the SEC).

          3.17 OTHER ACTIONS. The Company shall take all such other actions as
any Investor or the underwriters, if any, reasonably request in order to
expedite or facilitate the disposition of such Registrable Securities.

          3.18 LIMITATIONS ON GRANT OF OTHER REGISTRATION RIGHTS. Except as set
forth in the Disclosure Schedule to the Securities Purchase Agreement, the
Company does not have in place any agreements that would require it to include
securities in the Initial Registration Statement other than the Registrable
Securities under this Agreement and the Common Stock issuable under the option
referenced in the last

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sentence of this Section 3.18. From and after the date of this Agreement, the
Company shall not, and shall not agree to, allow the holders of any securities
of the Company to include any of their securities in the Initial Registration
Statement under Section 2.1 hereof or any amendment or supplement thereto under
Section 3.2 hereof without the consent of the holders who Beneficially Own a
majority in interest of the Registrable Securities, except for (a) Registrable
Securities held by additional investors who become parties to this Agreement
pursuant to Section 11.2, and (b) shares of Common Stock issuable upon exercise
of the options issued or issuable to Steve Carnevale.

          3.19 BLUE SKY LAWS. The Company shall not be obligated to register or
qualify the re-sale of the Registrable Securities under the blue sky laws of the
various states, unless specifically requested by the Investors. If requested by
the Investors, the Company shall from time to time take such actions as the
Company shall reasonably determine are necessary to qualify the Registrable
Securities for, or obtain exemption for the Registrable Securities for, resale
by the Investors under applicable securities or "blue sky" laws of the states of
the United States, and shall provide evidence of any such action so taken to the
Investors; provided, however, that the Company shall not be required to qualify
as a foreign corporation or file a general consent to service of process in any
such jurisdiction.

4. OBLIGATIONS OF THE INVESTORS.

          In connection with the registration of the Registrable Securities, the
Investors shall have the following obligations:

          4.1 FURNISHING INFORMATION TO THE COMPANY. Each Investor shall use its
best efforts to promptly provide the Company with any information reasonably
requested by the Company relating to such Investor, the plan of distribution or
otherwise within the knowledge of such Investor in connection with responding to
comments received by the Company from the SEC or in connection with the
preparation, filing or effectiveness of any registration statement hereunder. It
shall be a condition precedent to the obligations of the Company to complete the
registration pursuant to this Agreement with respect to the Registrable
Securities of a particular Investor that such Investor shall furnish to the
Company such information regarding itself, the Registrable Securities held by it
and the intended method of disposition of the Registrable Securities held by it
as shall be reasonably required to effect the registration of such Registrable
Securities and shall execute such documents in connection with such registration
as the Company may reasonably request. At least ten (10) business days prior to
the first anticipated filing date of a Registration Statement, the Company shall
notify each Investor of any information the Company requires from each such
Investor.

          4.2 COOPERATION. Each Investor shall cooperate with the Company as
reasonably requested by the Company in connection with the preparation and
filing of the Registration Statement hereunder, unless such Investor has
notified the Company in writing of such Investor's election to exclude all of
such Investor's Registrable Securities from the Registration Statement.

          4.3 UNDERWRITTEN OFFERINGS. In the event Investors who Beneficially
Own a majority in interest of the Registrable Securities being offered determine
to engage the services of an underwriter, each Investor agrees to enter into and
perform such Investor's obligations under an underwriting agreement, in usual
and customary form, including, without limitation, customary indemnification and
contribution obligations, with the underwriter(s) of such offering and the
Company and take such other actions as are reasonably required in order to
expedite or facilitate the disposition of the Registrable Securities, unless
such Investor has notified the Company in writing of such Investor's election
not to participate in such underwritten distribution. No Investor may
participate in any underwritten distribution hereunder unless such Investor (i)
agrees to sell such Investor's Registrable Securities on the basis provided in
any underwriting arrangements in usual and customary form entered into by the
Company, (ii) completes and executes all questionnaires, powers of attorney,
indemnities, underwriting agreements and other documents reasonably required
under the terms of such underwriting arrangements, and (iii) agrees to pay its
pro rata share of all underwriting discounts and commissions. Notwithstanding
anything in this Section 4.3 to the contrary, this Section 4.3 is not intended
to limit an Investor's rights under Section 2.1 or 3.4 of this Agreement.

                                        8
<Page>

          4.4 RECEIPT OF NOTIFICATION FROM THE COMPANY. In the event that the
Company informs the Investors that the Company must file an amendment or
supplement to the Registration Statement to correct an untrue statement or
omission pursuant to Section 3.5 of this Agreement, the Investors will not sell
any Registrable Securities until the Company notifies the Investors that the
Company has filed such amendment or supplement. Investors shall be free to sell
their Registrable Securities under a Registration Statement that has been
declared effective without prior notification to the Company, unless they are in
receipt of such a notice from the Company and the untrue statement or omission
has not yet been addressed by the Company.

5. EXPENSES OF REGISTRATION.

          All reasonable expenses incurred by the Company in connection with
registrations, filings or qualifications pursuant to Sections 2 and 3 above,
including, without limitation, all registration, listing and qualifications
fees, printers and accounting fees, the fees and disbursements of counsel for
the Company, shall be borne by the Company. Fees and disbursements of one
counsel selected by the Investors in connection with registrations, filings or
qualifications pursuant to Sections 2 and 3 above shall be paid by the Company.

6. INDEMNIFICATION.

          In the event any Registrable Securities are included in a Registration
Statement under this Agreement:

          6.1 INDEMNIFICATION BY THE COMPANY. To the extent permitted by law,
the Company will indemnify, hold harmless and defend (i) each Investor, and (ii)
the directors, officers, partners, members, employees and agents of such
Investor and each person who controls any Investor within the meaning of Section
15 of the Securities Act or Section 20 of the Securities Exchange Act of 1934,
as amended (the "Exchange Act"), if any (each, an "Indemnified Person"), against
any joint or several losses, claims, damages, liabilities or expenses
(collectively, together with actions, proceedings or inquiries by any regulatory
or self-regulatory organization, whether commenced or threatened, in respect
thereof, "Claims") to which any of them may become subject insofar as such
Claims arise out of or are based upon: (i) any untrue statement or alleged
untrue statement of a material fact in a Registration Statement or the omission
or alleged omission to state therein a material fact required to be stated or
necessary to make the statements therein not misleading, (ii) any untrue
statement or alleged untrue statement of a material fact contained in any
preliminary prospectus if used prior to the effective date of such Registration
Statement, or contained in the final prospectus (as amended or supplemented, if
the Company files any amendment thereof or supplement thereto with the SEC) or
the omission or alleged omission to state therein any material fact necessary to
make the statements made therein, in light of the circumstances under which the
statements therein were made, not misleading, or (iii) any violation or alleged
violation by the Company of the Securities Act, the Exchange Act, any other law,
including, without limitation, any state securities law, or any rule or
regulation thereunder relating to the offer or sale of the Registrable
Securities (the matters in the foregoing clauses (i) through (iii) being,
collectively, "Violations"). Subject to the restrictions set forth in Section
6.3 with respect to the number of legal counsel, the Company shall reimburse the
Investors and each other Indemnified Person, promptly as such expenses are
incurred and are due and payable, for any reasonable legal fees or other
reasonable expenses incurred by them in connection with investigating or
defending any such Claim. Notwithstanding anything to the contrary contained
herein, the indemnification agreement contained in this Section 6.1: (i) shall
not apply to a Claim arising out of or based upon a Violation which occurs in
reliance upon and in conformity with information furnished in writing to the
Company by such Indemnified Person expressly for use in the Registration
Statement or any such amendment thereof or supplement thereto; (ii) shall not
apply to amounts paid in settlement of any Claim if such settlement is effected
without the prior written consent of the Company, which consent shall not be
unreasonably withheld; and (iii) with respect to any preliminary prospectus,
shall not inure to the benefit of any Indemnified Person if the untrue statement
or omission of material fact contained in the preliminary prospectus was
corrected on a timely basis in the prospectus, as then amended or supplemented,
if such corrected prospectus was timely made available by the Company pursuant
to Section 3.3 hereof, and the Indemnified Person was promptly advised in
writing not to use the incorrect prospectus prior to the use

                                        9
<Page>

giving rise to a Violation and such Indemnified Person, notwithstanding such
advice, used it. Such indemnity shall remain in full force and effect regardless
of any investigation made by or on behalf of the Indemnified Person and shall
survive the transfer of the Registrable Securities by the Investors pursuant to
Section 11.1.

          6.2 INDEMNIFCATION BY AN INVESTOR. In connection with any Registration
Statement in which an Investor is participating, each such Investor agrees
severally and not jointly to indemnify, hold harmless and defend, to the same
extent and in the same manner set forth in Section 6.1, the Company, each of its
directors, each of its officers who signs the Registration Statement, its
employees, agents and each person, if any, who controls the Company within the
meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act,
and any other stockholder selling securities pursuant to the Registration
Statement or any of its directors or officers or any person who controls such
stockholder or underwriter within the meaning of the Securities Act or the
Exchange Act (collectively and together with an Indemnified Person, an
"Indemnified Party"), against any Claim to which any of them may become subject,
under the Securities Act, the Exchange Act or otherwise, insofar as such Claim
arises out of or is based upon any Violation, in each case to the extent (and
only to the extent) that such Violation occurs in reliance upon and in
conformity with written information furnished to the Company by such Investor
expressly for use in connection with such Registration Statement; and subject to
Section 6.3 such Investor will reimburse any legal fees and expenses (promptly
as such expenses are incurred and are due and payable) reasonably incurred by
them in connection with investigating or defending any such Claim; provided,
however, that the indemnity agreement contained in this Section 6.2 shall not
apply to amounts paid in settlement of any Claim if such settlement is effected
without the prior written consent of such Investor, which consent shall not be
unreasonably withheld; provided, further, however, that the Investor shall be
liable under this Agreement (including this Section 6.2 and Section 7) for only
that amount as does not exceed the net proceeds actually received by such
Investor as a result of the sale of Registrable Securities pursuant to such
Registration Statement. Such indemnity shall remain in full force and effect
regardless of any investigation made by or on behalf of such Indemnified Party
and shall survive the transfer of the Registrable Securities by the Investors
pursuant to Section 11.1.

          6.3 INDEMNIFICATION PROCEDURE.Promptly after receipt by an Indemnified
Person or Indemnified Party under this Section 6 of notice of the commencement
of any action (including any governmental action), such Indemnified Person or
Indemnified Party shall, 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 shall
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
control of the defense thereof with counsel mutually satisfactory to the
indemnifying party and the Indemnified Person or the Indemnified Party, as the
case may be; provided, however, that such indemnifying party shall not be
entitled to assume such defense and an Indemnified Person or Indemnified Party
shall have the right to retain its own counsel with the fees and expenses to be
paid by the indemnifying party, if, in the reasonable opinion of counsel
retained by the indemnifying party, the representation by such counsel of the
Indemnified Person or Indemnified Party and the indemnifying party would be
inappropriate due to actual or potential conflicts of interest between such
Indemnified Person or Indemnified Party and any other party represented by such
counsel in such proceeding or the actual or potential defendants in, or targets
of, any such action include both the Indemnified Person or the Indemnified Party
and the indemnifying party and any such Indemnified Person or Indemnified Party
reasonably determines that there may be legal defenses available to such
Indemnified Person or Indemnified Party which are in conflict with those
available to such indemnifying party. The indemnifying party shall pay for only
one separate legal counsel for the Indemnified Persons or the Indemnified
Parties, as applicable, and such legal counsel shall be selected by Investors
who Beneficially Own a majority-in-interest of the Registrable Securities
included in the Registration Statement to which the Claim relates, if the
Investors are entitled to indemnification hereunder, or by the Company, if the
Company is entitled to indemnification hereunder, as applicable. The failure to
deliver written notice to the indemnifying party within a reasonable time of the
commencement of any such action shall not relieve such indemnifying party of any
liability to the Indemnified Person or Indemnified Party under this Section 6,
except to the extent that the indemnifying party is actually prejudiced in its
ability to defend such action. The indemnification

                                       10
<Page>

required by this Section 6 shall be made by periodic payments of the amount
thereof during the course of the investigation or defense, as such expense,
loss, damage or liability is incurred and is due and payable.

7. CONTRIBUTION.

          To the extent any indemnification by an indemnifying party is
prohibited or limited by law, the indemnifying party agrees to make the maximum
contribution with respect to any amounts for which it would otherwise be liable
under Section 6 to the fullest extent permitted by law; provided, however, that
(i) no contribution shall be made under circumstances where the maker would not
have been liable for indemnification under the fault standards set forth in
Section 6, (ii) no person guilty of fraudulent misrepresentation (within the
meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any seller of Registrable Securities who was not guilty of
such fraudulent misrepresentation, and (iii) contribution (together with any
indemnification or other obligations under this Agreement) by any seller of
Registrable Securities shall be limited in amount to the net amount of proceeds
received by such seller from the sale of such Registrable Securities.

8. PARTICPATION RIGHTS.

          8.1 PARTICIPATION RIGHTS. The Company agrees that each Investor shall
have a right of first refusal to purchase its Pro Rata Percentage of the total
amount of any issuance of any shares of capital stock of any kind of the
Company, whether now or hereafter authorized, and rights, options, or warrants
to purchase said capital stock, and securities of any type whatsoever that are,
or by their terms may become, convertible into said capital stock that the
Company, from time to time, may propose to sell and issue (the "Participation
Securities"), provided, however, that the term Participation Securities shall
not apply to (1) the issuance of securities upon exercise or conversion of the
Company's options, warrants or other convertible securities outstanding as of
the date hereof that are disclosed in Section 4.3 of the Disclosure Schedule to
the Securities Purchase Agreement, (2) the grant of additional options or
warrants, or the issuance of additional securities, under any duly authorized
Company stock option, stock purchase or restricted stock plan for the benefit of
the Company's employees, consultants or directors, or (3) upon conversion of the
Preferred Stock or exercise of the Warrants.

          8.2 RIGHTS NOTICE. If the Company proposes to issue Participation
Securities, it will give each Investor written notice (the "Rights Notice") of
the Company's intention to do so, describing the Participation Securities, the
price, and the general terms upon which the Company proposes to issue them. Each
such Investor will have 14 days from the date of delivery of the Rights Notice
to agree to purchase up to its Pro Rata Percentage of the total amount of such
Participation Securities for the price and upon the general terms specified in
the Rights Notice by giving written notice to the Company setting forth the
quantity of Participation Securities to be purchased.

          8.3 CLOSING OF SALE OF PARTICIPATION SECURITIES. The Company will have
120 days after the date of delivery of the Rights Notice to sell the
Participation Securities that were not purchased by the Investors, at a price
and upon general terms no more favorable to the purchasers thereof than the
price and general terms specified in the Rights Notice. If the Company does not
sell the Participation Securities within said 120-day period as provided in the
preceding sentence, the Company will not thereafter issue or sell any of such
Participation Securities without complying with the provisions of Section 8.2.

9. BOARD MATTERS

          9.1 BOARD NOMINEE. For so long as the Investors (or their permitted
assigns) collectively Beneficially Own at least 250,000 Registrable Securities
(as adjusted for stock splits, reverse stock splits and the like), the Company
shall use its best efforts to have one nominee of holders of a majority of the
Registrable Securities Beneficially Owned by the Investors elected to the Board
(the "Investor Director"); provided, however, that so long as the holders of
Preferred Stock are entitled to nominate and elect a director pursuant to the
provisions of the Certificate of Designations, the nomination and election of
the Investor Director shall be governed by the Certificate of Designations and
not this Section 9.1.

                                       11
<Page>

          9.2 BOARD OBSERVER. For so long as the Investors (or their permitted
assigns) collectively Beneficially Own at least 125,000 Registrable Securities
(as adjusted for stock splits, reverse stock splits and the like), the holders
of a majority of the shares of Registrable Securities Beneficially Owned by the
Investors shall have the right to appoint a board observer who shall have the
right to attend and observe all meetings of the Board of Directors and
committees thereof. If the Company proposes to take any action by written
consent in lieu of a meeting of its Board of Directors or any committee thereof,
the Company shall give written notice thereof to the Board observer prior to the
effective date of such consent describing in reasonable detail the nature and
the substance of such action.

          9.3 INDEMNIFICATION AND INSURANCE. The Company shall enter into an
indemnification agreement with the Board member designated by the Investors in
accordance with Section 9.1 on terms no less favorable than the indemnification
agreement that any other member of the Board has from the Company. At all times
that a designee of the Investors is serving on the Board of Directors, the
Company shall maintain directors and officers insurance coverage with a minimum
coverage limit of $6 million and a deductible of no more than $150,000. The
policy shall be an "occurrence" policy, and not a "claims made" policy. The
Company represents that such policy is in place as of the date of execution of
this Agreement.

10. REPORTS UNDER THE EXCHANGE ACT.

          With a view to making available to the Investors the benefits of Rule
144 promulgated under the Securities Act or any other similar rule or regulation
of the SEC that may at any time permit the Investors to sell securities of the
Company to the public without registration ("Rule 144"), the Company agrees,
during the Registration Period, to:

          (a) file with the SEC in a timely manner and make and keep available
all reports and other documents required of the Company under the Securities Act
and the Exchange Act so long as the Company remains subject to such requirements
(it being understood that nothing herein shall limit the Company's obligations
under Section 5.3 of the Securities Purchase Agreement or similar obligations of
the Company to Investors who become party to this Agreement pursuant to Section
11.2) and the filing and availability of such reports and other documents is
required for the applicable provisions of Rule 144; and

          (b) furnish to each Investor so long as such Investor owns Registrable
Securities, promptly upon request, (i) a written statement by the Company that
it has complied with the reporting requirements of Rule 144, the Securities Act
and the Exchange Act, (ii) a copy of the most recent annual or quarterly report
of the Company and such other reports and documents so filed by the Company, and
(iii) such other information as may be reasonably requested to permit the
Investors to sell such securities pursuant to Rule 144 without registration.

11. ASSIGNMENT OF RIGHTS; ADDITIONAL INVESTORS.

          11.1 ASSIGNMENT. The rights of the Investors hereunder, including the
right to have the Company register Registrable Securities pursuant to this
Agreement, shall only be assignable by an Investor to a transferee or assignee
of Registrable Securities, Preferred Stock or Warrants if: (i) the Company is
furnished with written notice of (a) the name and address of such transferee or
assignee and (b) the securities with respect to which such registration rights
are being transferred or assigned, (ii) the transferee or assignee agrees in
writing with the Company to be bound by all of the provisions contained herein,
and (iii) such transfer shall have been made in accordance with the applicable
requirements of the Securities Purchase Agreement (or, if applicable, other
purchase agreement entered into by an Investor who becomes party to this
Agreement pursuant to Section 11.2). In addition, and notwithstanding anything
to the contrary contained in this Agreement, the Securities Purchase Agreement
(or other purchase agreement entered into by any Investors who become party to
this Agreement pursuant to Section 11.2) or the Warrants, the Registrable
Securities, Preferred Stock and Warrants may be pledged, and all rights of the
Investors under this Agreement or any other agreement or document related to the
transaction contemplated

                                       12
<Page>

hereby may be assigned, without further consent of the Company, to a bona fide
pledgee in connection with an Investor's margin or brokerage accounts.

          11.2 ADDITIONAL INVESTORS. If after the date hereof, the Company sells
additional shares of Preferred Stock as permitted under Section 5.9 of the
Securities Purchase Agreement, the Company may allow the purchasers thereof to
become parties to this Agreement by (a) obtaining an executed written instrument
from the purchasers thereof in which they agree to be bound by the terms and
conditions of this Agreement as a party to this Agreement, and (b) providing the
existing Investors written notice of the addition of such new parties and the
number of Registrable Securities Beneficially Owned by such new Investors.. Such
purchasers shall thereafter be deemed "Investors" hereunder and parties to this
Agreement.

12. AMENDMENT OF RIGHTS.

          Provisions of this Agreement may be amended and the observance thereof
may be waived (either generally or in a particular instance and either
retroactively or prospectively), only with written consent of the Company, and
the Investors who Beneficially Own 66-2/3% of the Registrable Securities
Beneficially Owned by all Investors (or their permitted assigns). Any amendment
or waiver effected in accordance with this Section 12 shall be binding upon each
Investor and the Company.

13. MISCELLANEOUS.

          13.1 HEADINGS. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

          13.2 NOTICE. Any notices required or permitted to be given under the
terms of this Agreement shall be sent by certified or registered mail (return
receipt requested) or delivered personally or by courier or by confirmed
telecopy, and shall be effective five (5) days after being placed in the mail,
if mailed, one (1) business day after being deposited with a nationally
recognized overnight delivery service, or immediately if delivered personally,
by same-day courier or by confirmed telecopy, (such confirmation being
conclusive proof of receipt or delivery) in each case addressed to a party. The
addresses for such communications shall be:

          If to the Company:

                  Centiv, Inc.
                  998 Forest Edge Drive
                  Vernon Hills, IL 60061
                  Telephone No.:  847-876-8300
                  Facsimile No.:  847-955-1269
                  Attention:  President

          With a copy to:

                  Gardner, Carton & Douglas
                  321 North Clark Street
                  Chicago, IL  60610
                  Telephone No.:  312-245-8431
                  Facsimile No.:  312-644-3381
                  Attention:  Stephen Tsoris

If to an Investor, to the address of such Investor set forth on Exhibit A to the
Securities Purchase Agreement (or other purchase agreement entered into by any
Investors who become party to this Agreement pursuant to Section 11.2) or such
other address as is provided by the Investor to the Company in writing pursuant
to this Section 13.2, with a copy to:

                                       13
<Page>

                  Richard Friedman, Esq.
                  9705 Eagle Rising Cove
                  Austin, TX 78730
                  Telephone No.:   (512) 338-0145
                  Telecopy No.:    (512) 338-9131

          13.3 FAILURE TO EXERCISE RIGHTS OR REMEDIES. Failure of any party to
exercise any right or remedy under this Agreement or otherwise, or delay by a
party in exercising such right or remedy, shall not operate as a waiver thereof.

          13.4 GOVERNING LAW; JURISDICTION. This Agreement shall be governed by
and construed in accordance with the laws of the State of California applicable
to contracts made and to be performed in the State of California. Each party
irrevocably consents to the non-exclusive jurisdiction of the United States
federal courts and state courts located in San Francisco, California in any suit
or proceeding based on or arising under this Agreement. Each party irrevocably
waives the defense of an inconvenient forum to the maintenance of such suit or
proceeding in such courts. Each party further agrees that service of process
upon it mailed by first class mail to the address set forth in Section 13.2
shall be deemed in every respect effective service of process upon it in any
such suit or proceeding. Nothing herein shall affect any party's right to serve
process in any other manner permitted by law. Each party agrees that a final
non- appealable judgment in any such suit or proceeding shall be conclusive and
may be enforced in other jurisdictions by suit on such judgment or in any other
lawful manner.

          13.5 ENTIRE AGREEMENT. This Agreement, the Securities Purchase
Agreement or other purchase agreement entered into by any Investors who become
party to this Agreement pursuant to Section 11.2 (including all schedules and
exhibits thereto), and the Warrants constitute the entire agreement among the
parties hereto with respect to the subject matter hereof and thereof. There are
no restrictions, promises, warranties or undertakings, other than those set
forth or referred to herein and therein. This Agreement, the Securities Purchase
Agreement (or other purchase agreement entered into by any Investors who become
party to this Agreement pursuant to Section 11.2) and the Warrants supersede all
prior agreements and understandings among the parties hereto and thereto with
respect to the subject matter hereof and thereof.

          13.6. SUCCESSORS AND ASSIGNS. Subject to the requirements of Section
11.1 hereof, this Agreement shall inure to the benefit of and be binding upon
the successors and assigns of each of the parties hereto. The Company shall not
assign this Agreement or any rights or obligations hereunder without the prior
written consent of the Investors, except in connection with a merger,
consolidation or sale of all or substantially all of the Company's assets in
which the surviving or successor entity in such transaction (a) assumes the
Company's obligations hereunder, and (b) is a publicly traded Company whose
common stock is listed and trades on Nasdaq, the New York Stock Exchange or the
American Stock Exchange.

          13.7 COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original but all of which shall
constitute one and the same agreement. This Agreement, once executed by a party,
may be delivered to the other party hereto by facsimile transmission of a copy
of this Agreement bearing the signature of the party so delivering this
Agreement.

          13.8 OTHER ACTIONS. Each party shall do and perform, or cause to be
done and performed, all such further acts and things, and shall execute and
deliver all such other agreements, certificates, instruments and documents, as
the other party may reasonably request in order to carry out the intent and
accomplish the purposes of this Agreement and the consummation of the
transactions contemplated hereby.

          13.9 DETERMINATIONS. All consents, approvals and other determinations
to be made by the Investors pursuant to this Agreement shall be made by the
Investors who Beneficially Own 66-2/3% of the Registrable Securities
Beneficially Owned by all Investors (or their permitted assigns).

                                       14
<Page>

          IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed as of the date written in the first paragraph of this Agreement.

                                                COMPANY:

                                                CENTIV, INC.

                                                By: /s/ Thomas M. Mason
                                                   ---------------------------
                                                Title: Chief Financial Officer
                                                       -----------------------

                                       15
<Page>

                                  CENTIV, INC.
                            INVESTOR RIGHTS AGREEMENT
                             INVESTOR SIGNATURE PAGE

                                                ------------------------------
                                                (PRINT NAME OF INVESTOR)

                                                ------------------------------
                                                (SIGNATURE)

                                                ------------------------------
                                                (PRINTED NAME OF SIGNATORY)

                                                ------------------------------
                                                (TITLE OF SIGNATORY)

                                       16
<Page>

                                    EXHIBIT 1
                                       to
                            Investor Rights Agreement

[Date]

[Name and address of transfer agent]

Ladies and Gentlemen:

We have acted as counsel to Centiv, Inc., a Georgia corporation (the "Company"),
in connection with the Registration Statement on Form S-3 (the "Registration
Statement") filed with the Securities and Exchange Commission (the "Commission")
on or about _______ __, 2002, for the purpose of registering under the
Securities Act of 1933, as amended, up to ________ shares of its Class A Common
Stock, $.001 par value (the "Shares") for resale by certain selling
stockholders.

It is our opinion that the Registration Statement on Form S-3 (File No. 333-
_____________) naming [names of Investors] as selling stockholders of the Shares
was declared effective by the Securities and Exchange Commission on _________,
2002.

Our opinion expressed in this letter is based solely upon a letter from the
Commission date _______, 2002 confirming that the registration was declared
effective and telephone communications between ______________, an attorney of
this office, and ___________, a member of the Commission staff on ___________,
2002, confirming that no stop order has been issued as of the date of such
communication.

This opinion is rendered to you in connection with the request to remove the
legends from the Shares and is solely for your benefit. This opinion may not be
relied upon by you for any other purpose, or relied upon by any other person,
firm, corporation or other entity for any purpose without our prior consent. We
disclaim any obligation to advise you of any change of law that occurs, or any
facts of which we may become aware, after the date of this opinion.

                                Very truly yours,

cc: [Names of Investor]

                                       17
<Page>

                              SCHEDULE OF INVESTORS

<Table>
<Caption>
------------------------------------------------------------------------------------------------------------------------------
                                                   NUMBER OF UNITS (EACH
                                                CONSISTING OF ONE SHARE OF
                                                   PREFERRED STOCK AND A
                                                  WARRANT TO PURCHASE ONE                                FIRST OR SECOND
NAME AND ADDRESS                                 SHARE OF PREFERRED STOCK)        INVESTMENT AMOUNT          CLOSING
------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>                      <C>                          <C>
Fieberg Inter-Vivos Revocable Trust                       10,000                  $   100,000                  First
28342 Via Ordaz
San Juan Capistrano, CA 92678
Telephone No.:  (949) 493-7638
Telecopy No.:  (949) 240-1213
Attention:  Paul H. Fieberg

------------------------------------------------------------------------------------------------------------------------------
Sixth Bridge L.P.                                          5,000                  $    50,000                  First
576 Dalewood Drive
Orinda, CA 94563
Telephone No.:  (925) 254-4443
Telecopy No.:  (925) 254-4435
Attention: Albert E. Sisto

------------------------------------------------------------------------------------------------------------------------------
Talkot Crossover Fund                                     50,000                  $   500,000                  First
2400 Bridgeway, Suite 200
Sausalito, CA 94965
Telephone No.:  (415) 332-3760
Telecopy No.:  (415) 332-3760 x6019
Attention:  Thomas B. Akin

------------------------------------------------------------------------------------------------------------------------------
Thomas B. Akin                                            50,000                  $   500,000                  First
2400 Bridgeway, Suite 200
Sausalito, CA 94965
Telephone No.:  (415) 332-3760
Telecopy No.:  (415) 332-3760 x6019

------------------------------------------------------------------------------------------------------------------------------
EDJ Limited                                               10,000                  $   100,000                  Second
c/o Deltec Bank & Trust
Deltec House/Lyford Cay
P.O. Box N-3229
Nassau, Bahamas
Telephone No.:  (415) 461-4410
Telecopy No.:  (415) 461-4405
Attention:  Jeffrey H. Porter

------------------------------------------------------------------------------------------------------------------------------
Ben Joseph Partners                                        5,000                  $    50,000                  Second
300 Drakes Landing Road, Suite 175
Greenbrae, CA 94904-3124
Telephone No.:  (415) 461-4410
Telecopy No.:  (415) 461-4405
Attention:  Jeffrey H. Porter

------------------------------------------------------------------------------------------------------------------------------
</Table>

<Page>

<Table>
<Caption>
------------------------------------------------------------------------------------------------------------------------------
                                                   NUMBER OF UNITS (EACH
                                                CONSISTING OF ONE SHARE OF
                                                   PREFERRED STOCK AND A
                                                  WARRANT TO PURCHASE ONE                                FIRST OR SECOND
NAME AND ADDRESS                                 SHARE OF PREFERRED STOCK)        INVESTMENT AMOUNT          CLOSING
------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>                      <C>                          <C>
Robert Schacter                                           10,000                  $   100,000                  Second
c/o Reedland Capital Partners
30 Sunnyside Avenue
Mill Valley, CA 94941
Telephone No.:  (415) 383-4700
Telecopy No.:  (415) 383-4799

------------------------------------------------------------------------------------------------------------------------------
Pennell Venture Partners Marathon Fund II, LP             50,000                  $   500,000                  First
Pennell Venture Partners
10 Jones Street, 6th Floor
New York, NY 10014
Telephone No.:  (212) 206-1295
Telecopy No.:  (646) 365-3195
Attention:  Thomas B. Pennell

------------------------------------------------------------------------------------------------------------------------------
Sabre Institutional Partners                               3,600                  $    36,000                  First
c/o Barbary Coast Capital Management
One Sansome Street, Suite 2900
San Francisco, CA 94104
Telephone No.:  (415) 835-3880
Telecopy No.:  (415) 835-3890
Attention:  Stephen Worthington

------------------------------------------------------------------------------------------------------------------------------
ZCM Asset Holding Company, LLC                             2,200                  $    22,000                  First
c/o Barbary Coast Capital Management
One Sansome Street, Suite 2900
San Francisco, CA 94104
Telephone No.:  (415) 835-3880
Telecopy No.:  (415) 835-3890
Attention:  Stephen Worthington

------------------------------------------------------------------------------------------------------------------------------
Garrison Master Fund                                      19,200                  $   192,000                  First
c/o Barbary Coast Capital Management
One Sansome Street, Suite 2900
San Francisco, CA 94104
Telephone No.:  (415) 835-3880
Telecopy No.:  (415) 835-3890
Attention:  Stephen Worthington

------------------------------------------------------------------------------------------------------------------------------
Richard Friedman                                           1,000                  $    10,000                  First
9705 Eagle Rising Cove

------------------------------------------------------------------------------------------------------------------------------
</Table>

                                       19
<Page>

<Table>
<Caption>
------------------------------------------------------------------------------------------------------------------------------
                                                   NUMBER OF UNITS (EACH
                                                CONSISTING OF ONE SHARE OF
                                                   PREFERRED STOCK AND A
                                                  WARRANT TO PURCHASE ONE                                FIRST OR SECOND
NAME AND ADDRESS                                 SHARE OF PREFERRED STOCK)        INVESTMENT AMOUNT          CLOSING
------------------------------------------------------------------------------------------------------------------------------
<S>                                                      <C>                      <C>                     <C>
Austin, TX  78730
Telephone No.:  (512) 338-0145
Facsimile No.: (512) 338-9131

------------------------------------------------------------------------------------------------------------------------------
                                         TOTAL           216,000                  $ 2,160,000
------------------------------------------------------------------------------------------------------------------------------
</Table>

                                       20<Page>

                                                                     EXHIBIT 4.3

THIS WARRANT AND THE PREFERRED STOCK OR COMMON STOCK RECEIVABLE UPON THE
EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 ("THE
ACT"), OR ANY STATE SECURITIES LAWS. THEY MAY NOT BE TRANSFERRED OR OFFERED FOR
SALE IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT OR AN
OPINION OF COUNSEL, REASONABLY SATISFACTORY TO THE COMPANY, TO THE EFFECT THAT
REGISTRATION IS NOT REQUIRED.

              VOID AFTER 5:00 P.M., PACIFIC TIME, ON MARCH 28, 2007

            WARRANT TO PURCHASE SERIES A CONVERTIBLE PREFERRED STOCK

                                  CENTIV, INC.

WARRANT NO. ______              ORIGINAL ISSUE DATE:  MARCH 28, 2002

        This is to Certify That, FOR VALUE RECEIVED, _________ ("Holder") is
entitled to purchase, subject to the provisions of this Warrant, from CENTIV,
INC. (the "Company"), at any time until 5:00 P.M., Pacific Time, on March 28,
2007 ("Expiration Date"), 1,000 shares ("Shares") of the Company's Series A
Convertible Preferred Stock, $.001 par value per share ("Preferred Stock"),
which number is subject to adjustment from time to time as provided in this
Warrant. The shares of Preferred Stock are convertible into shares of the
Company's Class A Common Stock, $.001 per share ("Common Stock"), initially at
the rate of ten (10) shares of Common Stock for each one (1) share of Preferred
Stock. The exercise price of the Warrant shall be $15.00 per Share, subject to
adjustment as provided in Section 8 hereof ("Exercise Price").

        This Warrant has been issued pursuant to the Securities Purchase
Agreement dated March 28, 2002, among the Company and the purchasers identified
therein (as amended from time to time, the "Purchase Agreement"). The Holder is
entitled to the rights in the Purchase Agreement and in the Investor Rights
Agreement dated March 28, 2002 among the Company and the aforementioned
purchasers (as amended from time to time, the "Investor Rights Agreement"),
including the rights relating to the registration of the shares of Common Stock
issuable upon conversion of the Preferred Stock issued hereunder or otherwise
issuable under this Warrant (collectively, the "Common Shares"), unless the
Holder is not a party to those agreements and has not been validly assigned
rights therein.

        1. EXERCISE OF WARRANT. This Warrant may be exercised in whole or in
part at any time or from time to time until the Expiration Date or if the
Expiration Date is a day on which banking institutions are authorized by law to
close, then on the next succeeding day which shall not be such a day, by
presentation and surrender hereof to the Company or at the office its stock
transfer agent, if any, with the Purchase Form annexed hereto as Exhibit A duly
executed and accompanied by payment of the Exercise Price for the number of
Shares specified in such Form, in cash or check payable to the order of the
Company. The Shares so purchased shall be deemed to be issued to the Holder or
the Holder's designee, as the record owner of such shares, as of the close of
business on the date on which this Warrant

<Page>

shall have been surrendered and the completed Exhibit A shall have been
delivered and payment shall have been made for such Shares as set forth above
or, if such day is not a business day, on the next succeeding business day. The
Shares so purchased, representing the aggregate number of shares specified in
the executed Exhibit A, shall be delivered to the holder hereof within a
reasonable time, not exceeding ten (10) business days, after this Warrant shall
have been so exercised. If (a) the Holder is exercising this Warrant for shares
of Common Stock, (b) the Company's transfer agent is participating in the
Depository Trust Company ("DTC") Fast Automated Securities Transfer program, and
(c) the certificates therefor are not required to bear a legend and the holder
is not obligated to return such certificate for the placement of a legend
thereon, the Company, upon request of the Holder, shall cause its transfer agent
to electronically transmit the Shares so purchased to the Holder by crediting
the account of the holder or its nominee with DTC through its Deposit Withdrawal
Agent Commission system ("DTC Transfer"). If the aforementioned conditions to a
DTC Transfer are not satisfied or such transfer is not so requested by the
Holder, the Company shall deliver to the holder physical certificates
representing the Shares so purchased.

        If this Warrant is exercised in part only, the Company shall, upon
surrender of this Warrant for cancellation, execute and deliver a new Warrant
evidencing the right of the Holder to purchase the balance of the Shares
purchasable hereunder. Upon receipt by the Company of this Warrant at the office
of the Company, in proper form for exercise and accompanied by the Exercise
Price, the Holder shall be deemed to be the holder of record of the Shares
issuable upon such exercise, notwithstanding that the stock transfer books of
the Company shall then be closed or that certificates representing such Shares
shall not then be actually delivered to the Holder.

        2. REDEMPTION. During the term of this Warrant, the Company will have
the right to redeem all of the Warrants on fifteen (15) business days' prior
written notice (the period from the date notice is given to the date of
redemption being referred to as the "Notice Period") at a redemption price of
$0.10 (as appropriately adjusted for stock splits, reverse stock splits and
other events described in Section 8, including the conversion of all outstanding
shares of Preferred Stock to Common Stock so that the aggregate redemption price
remains unchanged) per Share any time after both of the following two conditions
have been satisfied: (i) the "Market Price" per share of Common Stock, as
defined below, has equaled or exceeded $1.80 (as adjusted for stock splits,
reverse stock splits and the like) for a period of ten (10) consecutive Trading
Days (as defined below); and (ii) a registration statement covering the resale
of the Common Shares has been declared effective by the Securities and Exchange
Commission and, during such 10-trading day period and at the time that such
notice was given, the registration statement remained effective and no
Suspension Periods (as defined in the Investor Rights Agreement) were then in
effect; provided, that for such redemption to be effective such registration
statement must also remain effective throughout the Notice Period. If the
Company elects to exercise its redemption right, the Holder of this Warrant may
either exercise the Warrant, in whole or in part, or tender the Warrant to the
Company for redemption, in whole or in part. Within ten (10) business days after
the expiration of the Notice Period, the Company will mail a redemption check
for the redemption price to the Holder of this Warrant should any portion of the
Warrant remain outstanding at the end of the Notice Period, whether or not the
Holder has surrendered this Warrant for redemption. This Warrant shall not be
exercisable after the expiration of the Notice Period, provided that the Company
mails the redemption check in the period provided in the previous sentence.
"Market Price" per share of Common Stock on a particular day means (i) the last
sale price on such day on the principal national stock exchange or quotation
system on which the Common Stock is then listed or admitted to trading, or (ii)
if no sale takes place on such date on any such exchange or quotation system,
the average of the reported closing bid and asked prices on such day as
officially noted on any such exchange or quotation system. "Trading Day" shall
mean a business day on which at least 25,000 shares of Common Stock are traded
on the principal United States securities exchange or automated quotation system
on which such security is listed or traded. The Warrants may not be redeemed at
any time that the Common Stock is not trading on a

                                        2
<Page>

national stock exchange or automated quotation system or trading in Common Stock
has been suspended by the exchange or automated quotation system.

        3. RESERVATION OF SHARES. The Company hereby agrees that at all times
that this Warrant remains outstanding there shall be reserved for issuance
and/or delivery upon exercise of this Warrant such number of Shares and Common
Shares as shall be required for issuance or delivery upon exercise of this
Warrant and/or conversion of the Shares.

        4. LIMIT ON FRACTIONAL SHARES. No fractional Shares, shares or scrip
representing fractional shares shall be issued upon the exercise of this
Warrant.

        5. SHARES TO BE FULLY PAID. All Shares will, upon issuance in accordance
with the terms of this Warrant, be validly issued, fully paid and nonassessable
and free from all taxes, liens, claims and encumbrances.

        6. EXCHANGE, ASSIGNMENT OR LOSS OF WARRANT. This Warrant is
exchangeable, without expense, at the option of the Holder, upon presentation
and surrender hereof to the Company for other Warrants of different
denominations entitling the Holder thereof to purchase (under the same terms and
conditions as provided by this Warrant) in the aggregate the same number of
Shares purchasable hereunder. Subject to Section 12, any transfer or assignment
shall be made by surrender of this Warrant to the Company with the Assignment
Form annexed hereto as Exhibit B duly executed and with funds sufficient to pay
any transfer tax; whereupon the Company shall, without charge, execute and
deliver a new Warrant in the name of the assignee named in such instrument of
assignment and this Warrant shall promptly be canceled. This Warrant may be
divided or combined with other Warrants which carry the same rights upon
presentation hereof at the office of the Company or at the office of its stock
transfer agent, if any, together with a written notice specifying the names and
denominations in which new Warrants are to be issued and signed by the Holder
hereof. The term "Warrant" as used herein includes any warrants issued in
substitution for or replacement of this Warrant, or into which this Warrant may
be divided or exchanged. Upon receipt by the Company of evidence satisfactory to
it of the loss, theft, destruction or mutilation of this Warrant, and (in the
case of loss, theft or destruction) of reasonably satisfactory indemnification,
and upon surrender and cancellation of this Warrant, if mutilated, the Company
will execute and deliver a new Warrant of like tenor and date. Subject to such
right of indemnification, any such new Warrant executed and delivered shall
constitute an additional contractual obligation on the part of the Company,
whether or not this Warrant so lost, stolen, destroyed, or mutilated shall be at
any time enforceable by anyone.

        7. RIGHTS OF THE HOLDER. The Holder shall not, by virtue hereof, be
entitled to any rights of a shareholder in the Company, either at law or equity,
and the rights of the Holder are limited to those expressed in the Warrant (and,
if the Holder is a party or an assignee or rights therein, the Purchase
Agreement and the Investor Rights Agreement) and are not enforceable against the
Company except to the extent set forth herein (or therein).

        8. ADJUSTMENT PROVISIONS. The number and type of shares issuable upon
exercise of this Warrant shall be subject to adjustment from time to time as
follows:

               (a) If the number of shares of Preferred Stock outstanding is
        increased by a stock dividend payable in shares of Preferred Stock or by
        a subdivision or split-up of shares of Preferred Stock, then, following
        the record date for the determination of holders of Preferred Stock
        entitled to receive such stock dividend, subdivision or split-up, the
        number of shares of Preferred Stock for which this Warrant is
        exercisable and the Exercise Price shall be appropriately adjusted so
        that the number of shares of Preferred Stock issuable on exercise of
        this

                                        3
<Page>

        Warrant shall be increased, and the Exercise Price shall be decreased,
        in proportion to such increase in outstanding shares.

               (b) If the number of shares of Preferred Stock outstanding is
        decreased by a combination of the outstanding shares of Preferred Stock,
        then, following the record date for such combination, the number of
        shares of Preferred Stock for which this Warrant is exercisable and the
        Exercise Price shall be appropriately adjusted so that the number of
        shares of Preferred Stock issuable on exercise of this Warrant shall be
        decreased, and the Exercise Price increased, in proportion to such
        decrease in outstanding shares.

               (c) In the event of any capital reorganization of the Company,
        any reclassification of the stock of the Company (other than a change in
        par value or from no par value to par value or from par value to no par
        value or as a result of a stock dividend or subdivision, split-up or
        combination of shares), any consolidation or merger of the Company, or
        any sale, lease, conveyance to another person of the property of the
        Company pursuant to which the Company's Preferred Stock is converted
        into other securities, cash or assets, each Warrant shall after such
        reorganization, reclassification, consolidation, merger or conveyance be
        exercisable into the kind and number of shares of stock or other
        securities or property of the Company or of the corporation resulting
        from such consolidation or surviving such merger to which the holder of
        the number of shares of Preferred Stock deliverable (immediately prior
        to the time of such reorganization, reclassification, consolidation or
        merger) upon exercise of such Warrant would have been entitled upon such
        reorganization, reclassification, consolidation, merger or conveyance.
        The provisions of this clause shall similarly apply to successive
        reorganizations, reclassifications, consolidations, mergers or
        conveyances.

               (d) If any event occurs of the type contemplated by the
        adjustment provisions of this Section 8 but not expressly provided for
        by such provisions, the Company will give notice of such event to the
        Holders, and the Company's Board of Directors will make an appropriate
        adjustment in the Exercise Price and the number of shares of Preferred
        Stock acquirable upon exercise of this Warrant so that the rights of the
        holder shall be neither enhanced nor diminished by such event.

               (e) Notwithstanding anything to the contrary contained in this
        Warrant, in the event that all outstanding shares of the Preferred Stock
        are converted into Common Stock or redeemed, this Warrant shall
        immediately cease to be exercisable for shares of Preferred Stock and
        shall thereafter entitle the Holder to receive upon exercise that number
        of shares of Common Stock into which the Shares otherwise issuable on
        exercise of this Warrant would have been convertible at the time of such
        conversion or redemption, subject to the adjustments of this Section 8.
        Appropriate adjustment shall be made in the Exercise Price per share so
        that the aggregate Exercise Price for purchasing all shares issuable
        under this Warrant shall remain unchanged. By way of example, if all of
        the Preferred Stock converted into Common Stock at a time when the
        conversion ratio had not changed from the initial conversion ratio of
        ten (10) shares of Common Stock for each one (1) share of Preferred
        Stock and no adjustments had been made pursuant to the other paragraphs
        of this Section 8, then the number of shares of Common Stock issuable
        upon exercise of this Warrant would be ten times the number of shares of
        Preferred Stock issuable hereunder and the Exercise Price per share
        would change from $15.00 to $1.50. In addition to the foregoing, at any
        time after such conversion or redemption, the references in Sections 8
        and 10 of this Warrant to "Preferred Stock" shall instead be read as
        references to "Common Stock" and references in this Warrant to "Shares"
        shall be read to mean shares of Common Stock issuable upon exercise
        hereof.

                                        4
<Page>

        9. STATEMENT OF ADJUSTMENT. Whenever the Exercise Price shall be
adjusted as provided in Section 8, the Company shall make available for
inspection by the Holder during regular business hours, at its principal
executive offices or at such other place as may be designated by the Company, a
statement, signed by its chief executive officer or president, showing in detail
the facts requiring such adjustment and the Exercise Price that shall be in
effect after such adjustment. The Company shall also cause a copy of such
statement to be sent by first class certified mail, return receipt requested and
postage prepaid, to Holder at such Holder's address appearing on the Company's
records.

        10. NOTIFICATION OF OTHER EVENTS. In case at any time:

        (a) the Company shall declare any dividend upon the Preferred Stock
payable in shares of stock of any class or make any other distribution (other
than dividends or distributions payable in cash out of retained earnings
consistent with the Company's past practices with respect to declaring dividends
and making distributions) to the holders of the Preferred Stock;

        (b) the Company shall offer for subscription pro rata to the holders of
the Preferred Stock any additional shares of stock of any class or other rights;

        (c) there shall be any capital reorganization of the Company, or
reclassification of the Preferred Stock, or consolidation or merger of the
Company with or into another corporation or entity such that the holders of the
Company's capital stock immediately prior to such transaction or series of
related transactions hold less than 50% of the capital stock of the surviving
corporation or entity immediately after such transaction or series of
transactions, or sale of all or substantially all of the Company's assets to
another corporation or entity; or

        (c)  there shall be a voluntary or involuntary dissolution, liquidation
or winding-up of the Company;

then, in each such case, the Company shall give to the Holder (i) notice of the
date or estimated date on which the books of the Company shall close or a record
shall be taken for determining the holders of Preferred Stock entitled to
receive any such dividend, distribution, or subscription rights or for
determining the holders of Preferred Stock entitled to vote in respect of any
such reorganization, reclassification, consolidation, merger, sale, dissolution,
liquidation or winding-up and (ii) in the case of any such reorganization,
reclassification, consolidation, merger, sale, dissolution, liquidation or
winding-up, notice of the date (or, if not then known, a reasonable estimate
thereof by the Company) when the same shall take place. Such notice shall also
specify the date on which the holders of Preferred Stock shall be entitled to
receive such dividend, distribution, or subscription rights or to exchange their
Preferred Stock for stock or other securities or property deliverable upon such
reorganization, reclassification, consolidation, merger, sale, dissolution,
liquidation, or winding-up, as the case may be. Such notice shall be given at
least twenty (20) days prior to the record date or the date on which the
Company's books are closed in respect thereto. The Company shall publicly
disclose the events with respect to which any notice delivered hereunder relates
prior to delivery of such notice to the holder of this Warrant.

        11. NOTICES. Unless otherwise provided herein, any notice, request,
instruction or other document to be given hereunder by any party shall be in
writing and delivered in person or by courier or by facsimile transmission
(followed by mailing certified mail, postage prepaid, return receipt requested)
or mailed by certified mail, postage prepaid, return receipt requested, as
follows: (a) to the Holder at the Holder's address as it appears in the records
of the Company or at such other address as the Holder may otherwise indicate in
a written notice delivered to the Company or (b) to the Company, at 998 Forest
Edge Drive, Vernon Hills, IL 60061, Attn: President, or at such other address as
the Company may

                                        5
<Page>

otherwise indicate in a written notice delivered to Holder. All such notices,
requests, instructions, documents and other communications will (i) if delivered
personally to the address as provided in this Section 11, be deemed given upon
delivery, (ii), if delivered by facsimile transmission to the facsimile number
as provided in this Section 8, be deemed given upon receipt, and (iii) if
delivered by mail in the manner described above to the address as provided in
this Section 11, five (5) days after being placed in the mail.

        12. TRANSFER TO COMPLY WITH THE SECURITIES ACT OF 1933. The Company may
cause the following legend, or one similar thereto, to be set forth on each
certificate representing the Shares or any other security issued or issuable
upon exercise of this Warrant:

        The securities represented by this certificate may not be offered for
        sale, sold or otherwise transferred in the absence of an effective
        registration statement under the Securities Act of 1933 (the "Act"), and
        under any applicable state securities law, an opinion of counsel
        satisfactory to the Company that such registration is not, in the
        circumstances required, or evidence satisfactory to the Company that the
        Shares have been sold in compliance with Rule 144 promulgated under the
        Act.

        Neither this Warrant nor any Shares or Common Shares issued upon the
exercise hereof shall be transferred other than pursuant to an effective
registration statement under the Securities Act or an exemption from the
registration provisions thereof. Notwithstanding the foregoing, following the
date on which the Shares have been registered under the Securities Act of 1933,
as amended (the "Act"), pursuant to the Investor Rights Agreement or otherwise
may be sold by the holder pursuant to Rule 144(k) promulgated under the Act (or
a successor rule), the Shares shall not bear any restrictive legend.

        13. EXEMPTION FROM REGISTRATION FOR WARRANT EXERCISE.

        The Company and the Holder acknowledge that the Company will be relying
on an exemption from the registration requirements of the Act to deliver Shares
to the Holder(s) upon the exercise of the Warrant. The Holder agrees to provide
the Company with such information and representations as may be requested by the
Company in order to establish a claim to an exemption from the registration
requirements of the Act, and any applicable state securities laws, including, a
representation that the Holder(s) are taking the Shares or Common Shares for
investment, and not with a view to distribution.

        14. GOVERNING LAW; JURISDICTION. This Warrant shall be governed by and
construed in accordance with the laws of the State of California applicable to
contracts made and to be performed in the State of California. Each of the
Company and the Holder irrevocably consents to the non-exclusive jurisdiction of
the United States federal courts and state courts located in San Francisco,
California in any suit or proceeding based on or arising under this Warrant.
Each of the Company and the Holder irrevocably waives any objection to the
laying of venue and the defense of an inconvenient forum to the maintenance of
such suit or proceeding in such courts. Each of the Company and the Holder
further agrees that service of process upon it mailed by certified or registered
mail to the address set forth in Section 11 shall be deemed in every respect
effective service of process upon it in any such suit or proceeding. Nothing
herein shall affect the Holder's right to serve process in any other manner
permitted by law. Each of the Company and the Holder agrees that a final
non-appealable judgment in any such suit or proceeding shall be conclusive and
may be enforced in other jurisdictions by suit on such judgment or in any other
lawful manner.

        15. SUCCESSORS AND ASSIGNS. The rights evidenced hereby shall inure to
the benefit of and be binding upon the successors of the Company and the
successors and assigns of the Holder hereof. The

                                        6
<Page>

provisions of this Warrant are intended to be for the benefit of all Holders
from time to time of this Warrant and shall be enforceable by any such Holder.

        16. AMENDMENT. This Warrant may not be modified or amended or the
provisions hereof waived except by the written consent of the Company and the
Holder.

        17. OTHER ACTIONS. The Company will not avoid or seek to avoid the
observance or performance of any of the terms to be observed or performed by it
hereunder, but will at all times in good faith assist in the carrying out of all
the provisions of this Warrant and in the taking of all such action as may
reasonably be requested by the holder of this Warrant in order to protect the
economic benefit inuring to the holder hereof and the exercise privilege of the
holder of this Warrant against dilution or other impairment, consistent with the
tenor and purpose of this Warrant.

                                                CENTIV, INC.

                                                By:
                                                     ---------------------------
                                                      Name:
                                                      Title:

                                        7
<Page>

                                    EXHIBIT A

                                  PURCHASE FORM

                                                      DATED: ____________, 200__

The undersigned hereby irrevocably elects to exercise the Warrant to the extent
of purchasing __________ shares of [Preferred Stock/Common Stock] of Centiv,
Inc., and hereby makes payment of $_____________ in payment of the actual
Exercise Price thereof.

[_] The undersigned requests that the Company cause its transfer agent to
electronically transmit the Common Stock being acquired hereby to the account of
the undersigned or its nominee (which is _________________) with DTC through its
Deposit Withdrawal Agent Commission System ("DTC Transfer").

                     INSTRUCTIONS FOR REGISTRATION OF SHARES

Name:
       ------------------------------------------------------------------------
                  (Please typewrite or print in block letters)

Address:
         ----------------------------------------------------------------------

Signature:
          ---------------------------------------------------------------------

<Page>

                                    EXHIBIT B

                                 ASSIGNMENT FORM

                                                        DATED: ___________, 200_

FOR VALUE RECEIVED,
                    ---------------------------------------------

hereby sells, assigns and transfers unto

Name:
         ------------------------------------------------------------------
                  (Please typewrite or print in block letters)

Address:
          ------------------------------------------------------------------

the right to purchase Shares represented by this Warrant to the extent of
______________ shares of [Preferred Stock/Common Stock] as to which such right
is exercisable and does hereby irrevocably constitute and appoint
__________________, attorney, to transfer the same on the books of the Company
with full power of substitution in the premises.

                                                Signature:
                                                          ----------------------

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00036-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00036-of-00352.parquet"}]]