<PAGE>
                                                                     Exhibit 4.3


                         Senior Secured Convertible Note

       THIS NOTE AND ANY SECURITIES INTO WHICH THIS NOTE MAY BE CONVERTED
       (COLLECTIVELY, THE "SECURITIES") HAVE BEEN ACQUIRED FOR INVESTMENT AND
       HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED
       (THE "ACT"), OR THE SECURITIES LAWS OF ANY OTHER JURISDICTION. THE
       SECURITIES MAY NOT BE OFFERED, SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH
       REGISTRATION OR AN EXEMPTION THEREFROM UNDER THE SECURITIES ACT AND OTHER
       APPLICABLE SECURITIES LAWS.

                                   COSI, INC.

              AMENDED AND RESTATED SENIOR SECURED CONVERTIBLE NOTE

$304,634.26                  Due December 31, 2004            New York, New York
                                                                October 30, 2003

            Unless converted pursuant to Section 5 hereof, Cosi, Inc., a
Delaware corporation (the "Borrower"), hereby unconditionally promises to pay to
the order of Charles G. Phillips ("Lender"), (Lender, its successors or assigns,
as applicable, "Holder"), in lawful money of the United States of America and in
immediately available funds, the principal amount of three hundred four thousand
six hundred and thirty four dollars and twenty six cents ($304,634.26) (the
"Loan") on December 31, 2004 (the "Maturity Date"); and to pay interest at the
time, in the form and at the rate set forth herein on the unpaid principal
amount hereof, for the period commencing October 30, 2003 until such principal
amount shall be paid in full. This Amended and Restated Senior Secured
Convertible Note (as amended, supplemented, extended, restated, renewed,
refunded, replaced, refinanced, increased in amount or otherwise modified, in
each case from time to time and whether in whole or in part, this "Note")
evidences the unpaid principal amount of the Loan together with all accrued and
unpaid interest thereon (collectively, and together with all other amounts
payable under this Note, the "Obligations").

            This Note is issued to Holder in accordance with and subject to the
following terms and conditions:

      1.    INTEREST.

            (a) The outstanding principal amount of the Loan shall accrue
interest from the date hereof until all payments hereunder have been irrevocably
paid in full or this Note has been converted as provided in Section 5 hereof at
a per annum rate equal at all times to the lesser of (i) the maximum lawful rate
of interest in effect at such time under "applicable law" (as defined below),
and (ii) the rate of interest publicly announced from time to time by Bank of
America or any successor thereto, as its prime rate or reference rate (provided,
that if such financial institution publicly announces more than one prime rate
or reference rate, then the higher or highest of such rates) (such rate, the
"Index") plus three-quarters (0.75) percentage points per annum (provided, that
such rate shall be adjusted concurrently with, and such adjustments shall be
effective on the same date as, adjustments announced in such prime rate),
compounded monthly; provided, however, that from and after either (i) the
occurrence of an Event of Default (as defined below) (whether or not the Holder
has elected to accelerate unpaid principal and interest under this Note as a
result of such Event of Default); or (ii) the maturity of this Note (whether the
stated maturity date of this Note or the maturity date resulting from the
Holder's acceleration of unpaid principal and interest), then in
<PAGE>
either of such circumstances, interest on the unpaid principal balance of this
Note shall accrue at a rate equal to eight percent (8%) per annum above the
otherwise applicable rate stated above. Interest shall be calculated on the
basis of a year of 360 days and shall accrue on the outstanding principal amount
of this Note and, to the extent permitted by law, on any accrued but unpaid
interest thereon that has been compounded until all payments hereunder have been
irrevocably paid in full or the Note has been converted as provided in Section
5. Borrower acknowledges and agrees that the calculation of interest on the
basis described in the immediately preceding sentence may result in the accrual
and payment of interest in amounts greater than those which would be payable if
interest were calculated on the basis of a three hundred sixty-five (365) day
year. Except as otherwise provided herein, accrued and unpaid interest hereunder
shall be due and payable monthly on the seventh (7th) day of the month, with the
first such payment being payable on November 7, 2003.

            (b) If the Index ceases to be made available, the Holder shall
select an alternate index as a substitute for the Index (the "Substituted
Index") which, in the Holder's good faith judgment, is comparable to the Index
and which is not likely to result in the interest rate being substantially
different than if such prior Index had continued to be made available. In such
event, the Holder shall adjust the percentage point spread set forth above (the
"Spread") based on the value of the Substituted Index as of the last preceding
date on which the interest rate was adjusted or, if no such adjustment has yet
occurred, as of the date of this Note, such that the sum of the Substituted
Index and the adjusted Spread equals the sum of the prior Index plus the prior
Spread. Borrower acknowledges and agrees that the Index represents an index
which is quoted, published or announced from time to time by the financial
institution identified above as an index for variable interest rates. This Note
is secured by a security agreement attached as Exhibit A executed in favor of
the Holder, as secured party ("Security Agreement"), provided, however, that the
Company agrees that it shall not grant any other Person security in any of the
property of the Company (other than with respect to equipment pledged to secure
the Company's equipment loan credit facility).

            (c) It is expressly stipulated and agreed to be the intent of the
Holder and the Borrower to, at all times, conform to and contract in strict
compliance with applicable usury laws from time to time in effect. All
agreements between the Holder and the Borrower, including, without limitation,
this Note, are hereby limited by the provisions of this Section 1(c) which shall
override and control all such agreements, whether now existing or hereafter
arising and whether written or oral. In no way, nor in any event or contingency
(including, but not limited to, prepayment, default, demand for payment or
acceleration of maturity), shall the interest taken, reserved, contracted for,
charged, chargeable, received or collected under this Note exceed the maximum
nonusurious amount permitted by applicable law (the "Maximum Amount"). If, from
any possible construction of any agreement, document or instrument (including,
without limitation, this Note), interest would otherwise be payable in excess
of, or is adjudicated to be payable in excess of, the Maximum Amount, any such
construction shall be subject to the provisions of this Section 1(c), and, ipso
facto, such agreement, document or instrument shall be reformed and the interest
payable shall be reduced to the Maximum Amount, without the necessity of
execution of any amendment or new document. If the Holder shall ever receive
anything of value that is characterized as interest under applicable law and
that would apart from this provision be in excess of the Maximum Amount, an
amount equal to the amount that would have been excessive interest shall,
without penalty, be applied first to the reduction of the outstanding principal
amount of this Note, and second to the reduction of any other amounts due and
payable under this Note, and not to the payment of interest, or promptly
refunded to the Borrower or the other payor thereof if and to the extent such
amount that would have been excessive exceeds such unpaid principal amount and
such other amounts. The right to accelerate maturity of this Note or any other
indebtedness does not include the right to accelerate any interest that has not
otherwise accrued on the date of such acceleration, and the Holder does not
intend to take, reserve, contract for, charge, receive or collect any unearned
interest in the event of acceleration. All interest paid or agreed to be paid to
the Holder shall, to the extent permitted by applicable law, be amortized,
prorated, allocated and spread throughout the full stated term (including any
renewal or extension) of the indebtedness to which it relates so that the amount
of interest thereon does not exceed the Maximum Amount. As used in this Section
1(c), the term "applicable law" shall mean the laws of the State of New York or
the federal laws of the United States, whichever laws allow the greater
interest, applicable to commercial loans as such laws now exist or may be
changed or amended or come into effect in the future.


                                       2
<PAGE>
      2.    PAYMENTS.

            (a) All payments of principal and interest with respect to this Note
shall be made on the due date thereof no later than 3:00 p.m., New York, New
York time, in immediately available funds in lawful money of the United States
of America (without any counterclaim, offset or deduction whatsoever and free
and clear of, and without withholding or deduction for or on account of, any
present or future taxes, levies, imposts, duties, charges or fees of any
nature), to the Holder by wire transfer (and pursuant to specific instructions
to be supplied by the Holder prior to the date of the first such payment). All
payments (including all prepayments) hereunder received by the Holder shall be
applied first to the payment of accrued and unpaid interest hereunder and only
thereafter to the outstanding principal balance of this Note. Any payment
received by the Holder after 3:00 p.m., New York, New York time, on any day,
will be deemed to have been received on the next following "Business Day."
"Business Day" means any day on which banks are not authorized to be closed for
business in New York, New York.

            (b) The Holder and any person (including any natural person,
partnership, joint venture, corporation, limited liability company, association,
company, trust, any other entity, unincorporated organization and government and
any department, political subdivision or agency thereof, "Person") to which the
Holder sells, assigns, grants a participation in, or otherwise transfers, part
or all of its interest in this Note agree that on the date the Holder or Person
becomes a party to this Note, and from time to time thereafter if requested by
the Borrower or required because, as a result of a change in law or a change in
circumstances or otherwise, a previously delivered form or statement becomes
incomplete or incorrect in any material respect, it will deliver complete,
accurate and duly executed forms or other statements prescribed by the Internal
Revenue Service of the United States certifying the Holder's or such Person's
exemption from United States withholding taxes (including backup withholding
taxes) with respect to all payments to be made to such Holder or Person under
this Note, provided that any such Holder or Person shall not be required to
deliver such forms or statements because such exemption is not available to such
Holder or Person as the result of a change in law or interpretation taking
effect after the later of the date hereof, or the date on which such Person
acquired an interest in the Note.

            (c) Voluntary prepayment of the entire amount of the outstanding
principal (but not a portion that is less than the entire amount) of this Note
and any accrued and unpaid interest hereunder (the "Voluntary Prepayment") shall
be permitted prior to the Maturity Date, at the option of the Borrower, without
premium or penalty, provided, however, that the Borrower shall not be permitted
to make any Voluntary Prepayment if, within five (5) Business Days of receiving
notice from the Borrower of its intention to make the Voluntary Prepayment, the
Holder provides notice to the Borrower of its intention to exercise any or all
of the Holder's rights pursuant to Section 5 hereof.

            (d) The Borrower agrees that to the extent the Borrower makes a
payment or payments hereunder which payment or payments, or any part thereof,
are subsequently invalidated, declared to be fraudulent or preferential, set
aside and/or required to be repaid to the Borrower, its successors or assigns
under any bankruptcy law, state or federal law, common law or equitable cause,
then, to the extent of such payment or repayment, the obligations, or part
thereof, under this Note that have been paid, reduced or satisfied by such
amount shall be reinstated and continued in full force and effect as of the time
immediately preceding such initial payment, reduction or satisfaction.


                                       3
<PAGE>
      3. REPRESENTATIONS AND WARRANTIES. Borrower hereby represents, warrants
and covenants to the Holder that (i) all of the following provisions of this
Section 3 are true and correct at and as of the date of this Note and (ii) all
of the following provisions of this Section 3 are, and shall be, true and
correct at and as of each such date during which this Note is outstanding (with
the same effect as though made at and as of each such date during which this
Note is outstanding). Borrower's representations and warranties shall survive
the execution of this Note, notwithstanding any investigation at any time made
by or on behalf of any party.

            (a) Organization. Each of the Borrower and its Subsidiaries (as
defined below) (i) is duly organized, validly existing and in good standing
under the laws of the jurisdiction of its incorporation, (ii) has all corporate
power and authority to own, lease and operate its property and to carry on its
business as now being conducted or as its business is contemplated to be
conducted and to consummate the transactions contemplated by this Note and (iii)
is duly qualified or licensed to do business and is in good standing as a
foreign corporation under the laws of each jurisdiction where the nature of the
property owned or leased by it or the nature of the business conducted by it
makes such qualification or license necessary, except where the failure to be so
qualified or licensed (1) would not reasonably be expected to either prevent or
delay its ability to perform its obligations under this Note and (2) could not
reasonably be expected, individually or in the aggregate, to result in a
Material Adverse Effect (as defined below). For purposes of this Agreement, a
"Subsidiary" of any Person shall mean any corporation, partnership, joint
venture or other legal entity of which such Person (either alone or through or
together with any other Subsidiary), owns, directly or indirectly, more than 50%
of the stock or other equity interests, the holders of which are generally
entitled to vote for the election of the board of directors or other governing
body of such corporation, partnership, joint venture or other legal entity.

            (b) Due Authorization. The Borrower has all requisite corporate
power and authority to enter into, execute and deliver this Note and to perform
its respective obligations hereunder, and has taken all necessary corporate
action required for the due authorization, execution, delivery and performance
by it of this Note.

            (c) Due Execution; Enforceability. This Note has been duly and
validly executed and delivered by the Borrower and constitutes the valid and
binding obligation of the Borrower enforceable against it in accordance with its
terms, subject to applicable bankruptcy, insolvency, fraudulent conveyance,
reorganization, moratorium and similar laws affecting creditors' rights and
remedies generally and subject, as to enforceability, to general principles of
equity, including principles of commercial reasonableness, good faith and fair
dealing (regardless of whether enforcement is sought in a proceeding at law or
in equity).

            (d) Consents. Neither the execution, delivery or performance of this
Note by the Borrower, nor the consummation by the Borrower of its respective
obligations and the transactions contemplated by this Note, requires any consent
or approval of, authorization by, exemption from, filing or registration with,
or notice to any United States (Federal, state or local) or foreign government,
or governmental, regulatory, judicial or administrative authority, agency or
commission ("Governmental Entity") or other Person except (i) with regard to the
Stockholder Approval (as defined in Section 5 hereof), and (ii) where the
failure to obtain such consent, approval, authorization or exemption or to make
such filing or registration or to provide such notice (1) would not reasonably
be expected to either prevent or delay the Borrower's ability to perform its
obligations under this Note and (2) could not reasonably be expected,
individually or in the aggregate, to result in a Material Adverse Effect.

            (e) No Conflicts. The execution, delivery and performance of this
Note does not, and the consummation of the transactions contemplated hereby will
not, (i) conflict with, or result in any violation or breach of any provision of
the certificate of incorporation or bylaws of the Borrower or any of its
Subsidiaries, (ii) conflict with, result in any violation or breach of, or
constitute (with or without notice or lapse of time, or both) a default under or
conflict with (or give rise to any right of termination, amendment, cancellation
or acceleration of any right or obligation or loss of any benefit under) any of
the terms, conditions or provisions of any note, bond, mortgage, license,
indenture, lease, contract or other agreement, instrument or obligation to which
the Borrower or any of its Subsidiaries is a party or by which


                                       4
<PAGE>
any of them or any of their properties or assets may be bound or affected, (iii)
conflict with or violate any permit, concession, franchise, license, judgment,
injunction, order, decree, statute, law, ruling, ordinance, rule or regulation
(including, without limitation, federal and state securities laws and
regulations) (collectively, "Laws") applicable to the Borrower or any of its
Subsidiaries or by which any of their properties or assets are bound or affected
or (iv) result in the creation or imposition of any pledge, claim, lien, charge,
encumbrance or security interest of any kind or nature whatsoever (any of the
foregoing, an "Encumbrance") against any of the properties or assets of the
Borrower or any of its Subsidiaries, except for the Security Agreement, and
except in the case of clauses (ii) or (iii) above, where such conflicts or
violations could neither prevent or delay the Borrower's ability to consummate
the transactions contemplated by this Note nor reasonably be expected,
individually or in the aggregate, to result in a Material Adverse Effect.

            (f) SEC Filings. Except as disclosed in the Company SEC Reports (as
defined below) and in the registration statements filed by the Borrower with the
United States Securities and Exchange Commission ("SEC"), the Borrower has filed
all reports and registration statements required to be filed by it with the SEC.
As of its filing date, and giving effect to any amendments thereof, each report
and proxy statement filed by the Borrower with the SEC (collectively, the
"Company SEC Reports") and each registration statement filed by the Borrower
with the SEC complied as to form in all material respects with the applicable
requirements of the Securities Act of 1933, as amended, including the rules and
regulations promulgated thereunder (the "Securities Act") and the Securities
Exchange Act of 1934, as amended, including the rules and regulations
promulgated thereunder (the "Exchange Act"), as the case may be. As of its
filing date, and giving effect to any amendments thereof, each Company SEC
Report filed pursuant to the Exchange Act did not contain any untrue statement
of a material fact or omit to state any material fact necessary in order to make
the statements made therein, in the light of the circumstances under which they
were made, not misleading. The Borrower's registration statement on Form S-1
filed with the SEC on August 6, 2003, and any such amended or supplemented
version of such registration statement filed with the SEC, if applicable, and
each other registration statement filed by the Borrower with the SEC after the
date hereof pursuant to the Securities Act , as amended or supplemented, if
applicable (as of the date of any such registration statement and when any
amendment becomes effective) complies and will comply as to form in all material
respects with the applicable requirements of the Securities Act and does not and
will not contain any untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary to make the statements
therein not misleading.

            (g) Financial Statements. Each of the consolidated financial
statements (including, in each case, any related notes thereto) contained in the
Company SEC Reports and each of the consolidated financial statements
(including, in each case, any related notes thereto) contained in the
registration statements filed by the Borrower with the SEC (collectively, the
"Financial Statements") complied as to form in all material respects with
applicable accounting requirements and with the published rules and regulations
of the SEC with respect thereto, had been prepared in accordance with generally
accepted accounting principles ("GAAP") applied on a consistent basis throughout
the periods involved (except as may be indicated in the notes thereto or, in the
case of the unaudited financial statements contained therein (the "Interim
Financial Statements"), as permitted by Form 10-Q or the Exchange Act
regulations promulgated by the SEC), and each fairly presented the consolidated
financial position of the Borrower and its consolidated Subsidiaries in all
material respects as at the respective dates thereof and the consolidated
results of its operations and cash flows for the periods indicated in accordance
with GAAP (subject, in the case of the Interim Financial Statements, to normal
audit adjustments which were not and are not expected, individually or in the
aggregate, to be material in amount).

            (h) Absence of Certain Changes. Since December 30, 2002, except as
disclosed in the Company SEC Reports prior to the date of this Note, the
Borrower and its Subsidiaries have conducted their businesses in the ordinary
course, in a manner consistent with past practice, and there has not been any
event, occurrence or development of a state of circumstances or facts which,
individually or in the aggregate, has had or could reasonably be expected to
have a Material Adverse Effect or could prevent or delay the Borrower's ability
to consummate the transactions contemplated by this Note. For purposes of this
Note, a "Material Adverse Effect" means any fact, event, change, circumstance,
condition or effect which is or could reasonably be expected to be materially
adverse to the business, condition (financial or

                                       5
<PAGE>
otherwise), results of operations, prospects, properties, assets or liabilities
of the Borrower and its Subsidiaries, taken as a whole.

            (i) Litigation. Except as set forth in the Borrower's Annual Report
on Form 10-K/A filed on April 1, 2003 or the Borrower's Quarterly Reports on
Form 10-Q filed on May 9, 2003 and August 14, 2003, there is no judgment,
ruling, decree, injunction, rule or order of any Governmental Entity, arbitrator
or other Person outstanding against the Borrower or any of its Subsidiaries.
Since December 30, 2002, except as set forth in the Borrower's Annual Report on
Form 10-K/A filed on April 1, 2003 or the Borrower's Quarterly Reports on Form
10-Q filed on May 9, 2003 and August 14, 2003, there have been no claims,
actions, suits, proceedings or investigations, or any amendment of any prior
claim, action, suit, proceeding or investigation, initiated against or, to the
knowledge of the Borrower, threatened against or affecting the Borrower or any
of its Subsidiaries (or any of their respective properties or assets) at law or
in equity or before or by any Governmental Entity, arbitrator or other Person
which (i) in any manner challenges or seeks to prevent, enjoin, alter or
materially delay the transactions contemplated by this Note or (ii) if resolved
adversely to the Borrower or a Subsidiary could reasonably be expected to have,
individually or in the aggregate, a Material Adverse Effect.

            (j) No Preemptive Rights. No preemptive rights, participation
rights, rights of first offer or first refusal, tag-along or drag-along rights
or other approval rights (collectively, "Preemptive Rights") will apply or
become applicable in connection with or as a result of the transactions
contemplated by this Note.

            (k) Due Issuance and Authorization of Securities. All of the
outstanding shares of capital stock of the Borrower have been, or upon issuance
will be, validly issued, fully paid and non-assessable. No securities of the
Borrower are subject to Preemptive Rights or other similar rights of any or all
of the stockholders of the Borrower. This Note is, and any securities issuable
to the Holder upon conversion, exchange or exercise of this Note will be, upon
issuance, duly authorized, validly issued, fully paid and non-assessable, each
vesting in the Holder legal and valid title to such securities, free and clear
of all Encumbrances and are and will not be subject to Preemptive Rights or
other similar rights of any or all of the stockholders of the Borrower.

      4.    EVENTS OF DEFAULT.

            If any of the following events shall occur and be continuing (each
such event, an "Event of Default"):

            (i) the Borrower fails to repay the principal amount of this Note
when due, or fails to pay any interest thereon when due and such failure to pay
interest continues for five (5) days;

            (ii) any representation or warranty made by the Borrower in this
Note shall be false in any material respect;

            (iii) the Borrower fails to convert the outstanding principal amount
of this Note and any accrued and unpaid interest hereunder into shares of common
stock in accordance with the terms of Section 5 and such failure continues for
five (5) days;

            (iv) the Borrower violates any material covenant, agreement or
condition contained in this Note, which violation shall not have been cured for
a period of forty-five (45) days following notice to the Borrower from the
Holder;

            (v) this Note, or any part thereof, shall (other than resulting from
payment or by consent of the applicable parties thereto), at any time after its
execution and delivery and for any reason, cease to be in full force and effect
or shall be declared to be null and void or the validity or enforceability
thereof shall be contested by the Borrower or the Borrower shall deny that the
Borrower has any or further liability or obligation thereunder;


                                       6
<PAGE>
            (vi) any default or breach occurs under any other agreement,
document or instrument to which Borrower or any of its Subsidiaries is a party
that is not cured within any applicable grace period therefor, and such default
or breach involves the failure to make any payment when due in respect of any
principal of or interest on indebtedness or guaranteed indebtedness for borrowed
money (other than the Obligations) of Borrower or any of its Subsidiaries in
excess of $250,000 in the aggregate (including amounts owing to all creditors
under any combined or syndicated credit arrangements) and such failure causes,
or permits any holder of such indebtedness or guaranteed indebtedness or a
trustee to cause, such indebtedness or guaranteed indebtedness or a portion
thereof in excess of $250,000 in the aggregate to become due prior to its stated
maturity or prior to its regularly scheduled dates of payment, in each case,
regardless of whether such right is exercised, by such holder or trustee;

            (vii) Borrower fails to pay any of its indebtedness or to perform
any of its obligations when due under any document between Borrower and any
other Person who holds a lien on the collateral securing all or any part of the
Obligations ("Collateral") that is senior to the lien held by the Holder in the
Collateral and fails to cure such breach within any applicable cure period under
such document (provided, that nothing contained in this Section constitutes or
shall be construed as the Holder's consent to any lien being placed on the
Collateral, other than liens on equipment pledged to secure the Company's
equipment loan credit facility);

            (viii) the Borrower shall be liquidated, dissolved, adjudicated
insolvent, or shall fail to pay, or shall admit in writing its inability to pay
its debts as they mature, or shall make a general assignment for the benefit of
creditors; or the Borrower shall apply for or consent to the appointment of any
receiver, custodian, trustee or similar officer for it or for all or any
substantial part of its property, or such receiver, custodian, trustee or
similar officer shall be appointed without the application or consent of the
Borrower; or the Borrower shall institute (by petition, application, answer,
consent or otherwise), or take any action to authorize the institution of, any
bankruptcy, insolvency, reorganization, dissolution, liquidation or similar
proceeding relating to the Borrower under the Laws of any jurisdiction; or any
such proceeding shall be instituted (by petition, application or otherwise)
against the Borrower and such proceeding shall not be dismissed within thirty
(30) days after being instituted;

            (ix) any final, non-appealable money judgment, writ or warrant of
attachment, or similar process involving in any individual case or in the
aggregate at any time an amount in excess of $250,000 shall be entered into or
filed against the Borrower or any of its Subsidiaries or any of their respective
properties or assets;

            (x) a court order is entered against Borrower enjoining the conduct
of all or a material part of its business, and Borrower fails to cause such
injunction to be fully stayed, dissolved or removed within sixty (60) days after
such order is entered;

            (xi) the Borrower has, without the Holder's prior written consent,
(1) changed its jurisdiction of incorporation; (2) succeeded to all or any
substantial part of the liabilities of any other Person; (3) directly or
indirectly, consolidated with or merged into any other Person or permitted any
other Person to consolidate with or merge into it or engaged in any other
corporate reorganization; (4) sold, leased, conveyed, abandoned or otherwise
disposed of all or substantially all or any substantial part of its assets in
one transaction or a series of transactions; (5) engaged in a transaction or
series of transactions in which more than twenty percent (20%) of the voting
power of the Borrower directly or indirectly may be issued, transferred or
disposed of (including by exercise, exchange or conversion of derivative
securities) to a Person other than ZAM Holdings, L.P.; (6) incurred, assumed or
guaranteed any indebtedness for borrowed money or incurred Encumbrances (other
than pursuant to (A) Borrower's senior secured promissory notes, dated as of
August 5, 2003 and August 6, 2003, aggregating $1.5 million (the "Prior Note"),
(B) an Investment Agreement among Borrower, ZAM Holdings, L.P. ("ZAM"), Eric J.
Gleacher ("Gleacher"), Charles G. Phillips and LJCB Nominees Pty. Ltd. pursuant
to which Borrower issues to such other parties senior secured convertible notes
of Borrower (such agreement, the "Investment Agreement"); provided, that such
Investment Agreement expressly provides that such senior secured convertible
notes are exempt pursuant to this Section 4(xi)(6) and (C) senior secured
convertible notes, issued as of the date


                                       7
<PAGE>
hereof, or to be issued, by Borrower to ZAM and Gleacher in the principal
amounts of $1, 943,068.74 and $759,397, respectively) in excess of $3 million;
or (7) agreed or committed to do any of the foregoing;

            (xii) (1) the validity or priority of the Holder's security interest
in the Collateral is impaired in any material respect for any reason; or (2) the
value of the Collateral has deteriorated, declined or depreciated as a result of
any intentional act or omission by Borrower; or

            (xiii) an "Event of Default" shall occur under the Security
Agreement;

then, (A) upon the occurrence of any Event of Default described in clause (viii)
of this Section 4, the Obligations shall automatically become immediately due
and payable without presentment, demand, protest, notice of intent to
accelerate, notice of acceleration or further notice of any kind, all of which
are hereby expressly waived by the Borrower, and (B) upon the occurrence of any
other Event of Default, the Holder may, at its option, by written notice to the
Borrower declare the Obligations to be forthwith due and payable, whereupon such
Obligations shall become and be forthwith due and payable, without presentment,
demand, protest, notice of intent to accelerate, notice of acceleration or
further notice of any kind, all of which are hereby expressly waived by the
Borrower.

            Other than as provided in this Section 4, the Note shall be
satisfied only by Conversion pursuant to Section 5 or by payment in full of all
amounts due hereunder.

      5.    CONVERSION.

            (a) Conversion Right. Subject to and upon compliance with the
provisions hereof, and subject to the approval of the stockholders of Borrower
with respect to the conversion feature of this Note, but (provided that Borrower
shall not have presented at a meeting of its stockholders the conversion feature
of this Note for approval by such stockholders) only if required under
applicable Law, (the "Stockholder Approval"), the Holder shall have the right,
at any time or from time to time, to convert all or any portion of the Total
Convertible Amount into as many shares of common stock, par value $.01 per
share, of Borrower ("Common Stock") as the portion of the Total Convertible
Amount so converted is a multiple of the Initial Conversion Price or, in case an
adjustment of such price has taken place pursuant to the provisions of this
Section 5, then at the price as last adjusted and in effect at the date this
Note or portion thereof is surrendered for conversion (such price or such price
as last adjusted, as the case may be, the "Conversion Price"). Notwithstanding
the preceding sentence, if, pursuant to Article I, Section 1.1(b) of the
Investment Agreement, the stockholders of the Borrower collectively subscribe
for a number of Rights Shares that equals at least $2,000,000, then the Holder
shall elect to convert the Total Convertible Amount in its entirety into shares
of Common Stock of the Borrower pursuant to this Section 5. For the purposes of
this Note, the term "Total Convertible Amount" shall mean, on any date, the sum
of the unpaid principal amount of this Note and the accrued and unpaid interest
thereon on such date. For the purposes of this Note, the term "Initial
Conversion Price" shall mean the lesser of (i) $1.50 and (ii) 85% of the
weighted average price per share of Borrower's Common Stock as reported on the
Nasdaq National Market for the fifteen trading day period ending three trading
days before the conversion date (provided, that (1) if the shares of such Common
Stock then are not traded on the Nasdaq National Market, the average of the
highest reported bid and lowest reported asked price for each of such fifteen
days as reported by NASDAQ shall be used; (2) if the shares of such Common Stock
then are not listed and traded on the NASDAQ, the average closing prices for
such fifteen days as reported by the principal national securities exchange on
which the shares are listed and traded shall be used; or (3) if the shares of
such Common Stock are not then listed or traded on NASDAQ or a national
securities exchange, the fair market value as determined jointly in good faith
by the Holder and the Borrower shall be used).

            (b) Manner of Conversion. This Note may be converted on any Business
Day prior to the Maturity Date (any such date of conversion, a "Conversion
Date"). In order to exercise such conversion privilege, the Holder shall
surrender this Note to the Borrower accompanied by a written statement (the
"Conversion Notice") designating the portion of the Total Convertible Amount to
be converted. If the Holder elects to convert this Note, or a portion thereof,
such conversion (a "Conversion") shall be deemed to have taken place immediately
prior to the close of business on the Conversion Date, and

                                       8
<PAGE>
at such time the rights of the Holder as Holder of this Note shall cease to the
extent of the portion of the Total Convertible Amount so converted and the
Holder shall be treated for all purposes (with respect to such portion) as the
record holder of the Common Stock issuable upon Conversion at such time.

            (c) Delivery of Stock Certificates, Etc. The Borrower, at its
expense (including the payment by it of any documentary stamp or similar issue
or transfer taxes, other than any taxes which may then be payable in respect of
the transfer of any such shares of Common Stock in a name other than that of the
Holder), will issue and deliver to the Holder as promptly as practicable on or
after a Conversion Date a certificate or certificates for the number of shares
of Common Stock of the Borrower issuable upon the Conversion. If this Note shall
be converted only in part, the Borrower shall, upon such Conversion, execute and
deliver to the Holder, at the expense of the Borrower, a new Note in principal
amount equal to the unconverted portion of the Total Convertible Amount (dated
as of the Conversion Date).

            (d) Adjustments on Conversion. The Borrower shall pay all interest
on the portion of this Note surrendered for conversion accrued through the last
full business day immediately preceding the date that the Conversion Notice
shall have been received by the Borrower, provided that no such payment shall be
made if the interest so accrued is converted pursuant to this Section 5. No
fractional shares of common stock shall be issued upon conversion of this Note,
but, if the conversion results in a fraction, an amount equal to such fraction
multiplied by the Per Share Market Price of the Common Stock on the last
Business Day prior to the Conversion Date shall be paid in cash to the Holder.
"Per Share Market Price" means, for any date of determination thereof, the
average daily Market Price per share for the 15 trading days immediately
preceding such date. The term "Market Price" shall mean the last reported sale
price per share regular way of Borrower's Common Stock as reported on the Nasdaq
National Market (provided, that (1) if the shares of such Common Stock then are
not traded on the Nasdaq National Market, the average of the highest reported
bid and lowest reported asked price for such day as reported by NASDAQ shall be
used; (2) if the shares of such Common Stock then are not listed and traded on
the NASDAQ, the closing price for such day as reported by the principal national
securities exchange on which the shares are listed and traded shall be used; or
(3) if the shares of such Common Stock are not then listed or traded on NASDAQ
or a national securities exchange, the fair market value as determined jointly
in good faith by the Holder and the Borrower shall be used).

            (e) Adjustments to Conversion Price.

                  (i) Adjustments for Recapitalization. In case the Borrower at
      any time on or after the date hereof shall:

                  (A)   pay a dividend or make a distribution in shares of
                        Common Stock to holders of its capital stock of any
                        class,

                  (B)   subdivide its outstanding shares of Common Stock into a
                        larger number of shares,

                  (C)   combine its outstanding shares of Common Stock into a
                        smaller number of shares,

                  (D)   pay a dividend or make a distribution to holders of its
                        Common Stock in (1) shares of its capital stock other
                        than Common Stock, (2) assets (including, without
                        limitation, securities of other Persons), evidences of
                        indebtedness or rights, or (3) options or warrants to
                        subscribe for or purchase any of its securities
                        (collectively, "Other Securities or Assets"),

      then the Conversion Price shall be adjusted to that price determined by
      multiplying the Conversion Price in effect immediately prior to such event
      by a fraction (x) the numerator of which shall be the total number of
      outstanding shares of Common Stock of the Borrower immediately prior to
      such event, and (y) the denominator of which shall be the total number of
      outstanding shares of Common


                                       9
<PAGE>
      Stock of the Borrower immediately after such event; provided that if the
      Borrower shall pay a dividend or make a distribution on its Common Stock
      in Other Securities or Assets, the Conversion Price shall be adjusted to
      the price obtained by multiplying the price then subject to adjustment by
      a fraction (x) the numerator of which shall be the Per Share Market Price
      of the Common Stock on the record date for such dividend or distribution,
      less the fair market value (on a per share of Common Stock basis) as
      determined jointly in good faith by the Holder and the Borrower of the
      Other Securities or Assets so distributed, and (y) the denominator of
      which shall be the Per Share Market Price of the Common Stock on the
      record date for such dividend or distribution. Any adjustment made
      pursuant to this paragraph shall become effective immediately after the
      record date in the case of a dividend or distribution and shall become
      effective immediately after the effective date in the case of subdivision
      or combination. The provisions of this Section 5(e) shall apply to the
      Conversion Price determined (directly or indirectly) by reference to the
      Initial Conversion Price of $1.50 and to any transactions described in (A)
      through (D) above occurring during or after a fifteen trading day period
      referred to in Section 5(a) but ending on the Conversion Date; provided,
      that if any such transaction described in (A) through (D) above occurs
      during a fifteen trading day period referred to in Section 5(a), the
      calculation of the Conversion Price shall be equitably adjusted to provide
      for a consistent basis of calculation during such period.

                  (ii) De Minimis Adjustments. Except as hereinafter provided,
      no adjustment of the Conversion Price hereunder shall be made if such
      adjustment results in a change of less than 1% in the Conversion Price
      then in effect. Any adjustment of less than 1% in the Conversion Price
      then in effect shall be carried forward and shall be made at the time of
      and together with any subsequent adjustment which, together with
      adjustment or adjustments so carried forward, amounts to 1% or more of the
      Conversion Price then in existence.

            (f) Adjustments for Reorganization. If the Borrower shall be
reorganized or shall be merged into or consolidate with any another Person or
shall sell all or substantially all of its assets or another Person shall be
merged into Borrower and in connection therewith Common Stock of the Borrower
shall be changed or converted into Successor Assets (as hereinafter defined), or
if the Borrower shall issue by reclassification of its shares of Common Stock
any shares of capital stock of the Borrower (each such event, an "Organic
Change"), then, as a condition of such Organic Change, lawful and adequate
provision shall be made whereby the Holder shall thereafter have the right to
receive upon the basis and upon the terms and conditions specified herein and in
lieu of the shares of Common Stock immediately theretofore receivable upon
conversion of this Note, such shares of stock, securities, assets or cash
(collectively, the "Successor Assets") as may (by virtue of such Organic Change)
be issued or payable with respect to or in exchange for a number of outstanding
shares of Common Stock equal to the number of shares of Common Stock immediately
theretofore so receivable by the Holder hereunder had such Organic Change not
taken place. In any such case, appropriate provisions shall be made with respect
to the rights and interests of the Holder to the end that the provisions of this
Section 5 (including, without limitation, provisions for adjustment of the
Conversion Price) shall thereafter be applicable as nearly as may be, in
relation to any Successor Assets thereafter deliverable upon conversion of this
Note.

            (g) Dissolution or Liquidation. In the event of any proposed
distribution of the assets of the Borrower in dissolution or liquidation (except
under circumstances when Section 5(f) shall be applicable), the Borrower shall
mail notice thereof to the Holder of this Note and shall make no distribution to
stockholders until the expiration of 30 days from the date of mailing of such
notice and, in any such case, the Holder may exercise the conversion rights with
respect to this Note within 30 days from the date of mailing such notice and all
rights herein granted not so exercised within such 30-day period shall
thereafter become null and void.

            (h) Certain Events. If any event occurs of the type contemplated by
Sections 5(e), 5(f), or 5(g) but not expressly provided for by such provisions
which adversely affect the rights of the Holder in a manner different than the
holders of Common Stock, then the Borrower's board of directors shall make an
appropriate adjustment in the number of shares of Common Stock obtainable upon
conversion of this Note pursuant to Section 5(a) so as to protect the rights of
the Holder.


                                       10
<PAGE>
            (i) Notices. The Borrower shall provide notice to the Holder, in
accordance with Section 11 of this Note, at least ten (10) Business Days prior
to the record date (or, if there is no record date, the date of such dividend,
distribution or event) for (i) any dividend, distribution or event that would
trigger adjustment hereunder and (ii) any dividend or distribution to all
holders of Common Stock outside the ordinary course of business, describing the
material terms thereof. Upon any adjustment or other change relating to the
shares of Common Stock or other property issuable upon the Conversion pursuant
to Section 5(a), then and in each such case the Borrower shall give written
notice thereof to Holder, in accordance with Section 11 of this Note, which
notice shall state the increase or decrease, if any, in the number or other
denomination of the shares of Common Stock issuable upon the Conversion pursuant
to Section 5(a), and the amount of other property receivable upon the
Conversion, setting forth in reasonable detail the method of calculation and the
facts upon which such calculation is based.

            (j) Adequate Shares. The Borrower will at all times reserve and keep
available out of its authorized but unissued capital stock 609,269 shares of
Common Stock for the purpose of effecting the Conversion pursuant to Section
5(a). All shares of stock which may be issuable upon the Conversion pursuant to
Section 5(a) will, upon issuance, be validly issued, fully paid and
non-assessable and free from all taxes (other than any taxes which may then be
payable in respect of the transfer of any such shares), liens and charges with
respect to the issuance thereof. The shares of stock issuable upon the
Conversion pursuant to Section 5(a) shall be issued without charge to the Holder
thereof for any issuance tax in respect thereof or other cost incurred by the
Borrower in connection with the Conversion and the related issuance of such
shares. The Borrower shall not close its books against the transfer of shares of
stock issued or issuable upon the Conversion pursuant to Section 5(a) in any
manner which interferes with the timely conversion of this Note. The Borrower
shall provide reasonable assistance and cooperate with any Holder of this Note
as required to make any governmental filings or obtain any licenses, permits,
certificates, consents, orders, approvals or other authorizations from
governmental authorities (collectively, "Governmental Approvals") prior to or in
connection with the conversion of this Note (including, without limitation,
making any filings required to be made by the Borrower). The Borrower shall take
all such reasonable actions as may be necessary to assure that all stock which
may be issuable upon the Conversion pursuant to this Section 5 may be issued
without violation of any applicable Law or governmental regulation. The Borrower
shall, as promptly as practicable, duly call, give notice of, convene and hold a
meeting of its stockholders in accordance with applicable Law and its
organizational documents for the purpose of obtaining the Stockholder Approval
and the approval of the stockholders of Borrower with respect to the conversion
feature of this Note and the Prior Note ("Prior Note Approval"). The Borrower,
consistent with the board of directors' fiduciary duties, shall use its best
efforts to obtain the Stockholder Approval and Prior Note Approval in accordance
with applicable Law.

            (k) Listing Obligation. As long as Borrower has securities listed on
NASDAQ or any other stock exchange, Borrower will take all reasonable steps
necessary, and pay all reasonable fees required, to list all of the shares of
Common Stock issued or issuable upon conversion, exchange or exercise of, or
otherwise in connection with, this Note on NASDAQ or such other stock exchanges
in the United States of America on which the Common Stock then is listed.
Following the initial listing of such shares, the Borrower, consistent with the
board of directors' fiduciary duties, will use its commercially reasonable best
efforts to maintain the listing of such shares whenever the Common Stock is
listed on any such exchange.

      6. COVENANTS OF BORROWER WHILE NOTE IS OUTSTANDING. The Borrower agrees
that, so long as there is any unpaid principal or interest outstanding or other
amount due to the Holder under this Note:

            (i)   Payment of Obligations. The Borrower will pay and discharge,
                  and will cause each Subsidiary to pay and discharge, at or
                  before maturity, all their respective obligations and
                  liabilities, including, without limitation, tax liabilities,
                  except where such tax liabilities may be contested in good
                  faith by appropriate proceedings, and will maintain, and will
                  cause each Subsidiary to maintain, in accordance with
                  generally accepted accounting principles, appropriate reserves
                  for the accrual of any of the same, and except where such
                  failures to pay and


                                       11
<PAGE>
                  discharge, individually or in the aggregate, would not
                  reasonably be expected to have a Material Adverse Effect;

            (ii)  Maintenance of Property; Insurance. The Borrower will keep,
                  and will cause each Subsidiary to keep, all material property
                  useful and necessary in its business in good working order and
                  condition; and will maintain, and will cause each Subsidiary
                  to maintain (either in the name of the Borrower or in such
                  Subsidiary's own name) with financially sound and reputable
                  insurance companies, insurance on all their property in at
                  least such amounts and against at least such risks as are
                  usually insured against in the same general area by companies
                  of established repute engaged in the same or a similar
                  business. The Borrower will furnish to the Holder, upon
                  written request, full information as to the insurance carried;

            (iii) Conduct of Business and Maintenance of Existence. The Borrower
                  will continue, and will cause each Subsidiary to continue, to
                  engage in business of the same general type as now conducted
                  by the Borrower and its Subsidiaries, and will preserve, renew
                  and keep in full force and effect, and will cause each
                  Subsidiary to preserve, renew and keep in full force and
                  effect their respective corporate existence and their
                  respective rights, privileges and franchises necessary or
                  desirable in the normal conduct of business, except for such
                  failures to continue and failures to preserve, renew and keep
                  that, individually or in the aggregate, would not reasonably
                  be expected to have a Material Adverse Effect; provided that
                  nothing in this Section shall prohibit the abandonment or
                  termination of the corporate existence, rights, privileges or
                  franchises of any Subsidiary when deemed by the Borrower in
                  good faith to be in the best interest of its overall business;

            (iv)  Compliance with Laws. Each of Borrower and its Subsidiaries
                  shall comply with all federal, state, local and foreign Laws
                  and regulations applicable to it, except to the extent that
                  the failure to comply, individually or in the aggregate, could
                  not reasonably be expected to have a Material Adverse Effect;

            (v)   Books and Records; Inspections by Holder. Borrower shall keep
                  and maintain complete and accurate books and records relating
                  to its business at its principal place of business. The Holder
                  shall have access to such books and records at all reasonable
                  times upon not less than two (2) Business Days prior written
                  notice to Borrower for the purposes of examination,
                  inspection, verification, copying and for any other reasonable
                  purpose. Borrower authorizes the Holder, at its option but
                  without any obligation of any kind to do so, to discuss the
                  affairs, finances and accounts of Borrower with any of
                  Borrower's officers and directors and, at the Holder's
                  expense, with Borrower's independent accountants and auditors,
                  and Borrower irrevocably authorizes all accountants and
                  auditors employed or retained by Borrower to respond to and
                  answer all requests from the Holder for financial and other
                  information regarding Borrower. Borrower waives the benefit of
                  any accountant-client privilege or other evidentiary privilege
                  precluding or limiting the disclosure or delivery of any of
                  its books and records to the Holder (except that Borrower does
                  not waive any attorney-client privilege).

            (vi)  Notice of Material Adverse Changes. Borrower shall immediately
                  notify the Holder in writing of (a) any Material Adverse
                  Effect; (b) any material adverse change in the Collateral; (c)
                  any claim, action, suit, proceeding or investigation, or any
                  amendment of any prior claim, action, suit, proceeding or
                  investigation, initiated against or threatened against or
                  affecting the Borrower or any of its Subsidiaries (or any of
                  their respective properties or assets) which, individually


                                       12
<PAGE>
                  or in the aggregate, may cause or result in a Material Adverse
                  Effect or any material impairment in the ability of Borrower
                  to carry on its business in substantially the same manner as
                  it is now being conducted; and (d) any occurrence which could
                  form the basis of an Event of Default.

            (vii) Licenses. Borrower shall maintain all Governmental Approvals
                  necessary for the ownership of its properties and the conduct
                  of its businesses, except for Governmental Approvals the
                  failure of which to maintain would not reasonably be expected
                  to have a Material Adverse Effect.

            (viii) Further Assurances. Upon the Holder's request, Borrower shall
                  execute and deliver to the Holder such further documents and
                  agreements, in form and substance satisfactory to the Holder,
                  as the Holder may reasonably require to effectuate the terms
                  of this Agreement and the Security Agreement, including,
                  without limitation, executing, and causing the other necessary
                  parties to execute, a registration rights agreement covering
                  the shares of Common Stock issuable upon conversion of this
                  Note on terms acceptable to Holder.

            (ix)  Negative Covenants. Other than pursuant to the Investment
                  Agreement, the Borrower shall not, nor shall it permit any of
                  its Subsidiaries to, without the prior written consent of the
                  Holder:

                  (i) directly or indirectly, by operation of Law or otherwise,
      merge or consolidate with or into any Person;

                  (ii) (a) create, incur, assume or permit to exist any
      long-term Indebtedness (as defined below); (b) except in the ordinary
      course of business, consistent with past practice and in an aggregate
      amount not to exceed $250,000 for any consecutive twelve (12) month
      period, create, incur, assume or permit to exist short-term Indebtedness;
      (c) pay, repay, discharge, purchase, repurchase or satisfy any
      Indebtedness issued or guaranteed by the Borrower or any Borrower
      Subsidiary, except as required by the terms thereof; (d) modify the terms
      of any Indebtedness or other liability, other than modifications of short
      term debt in the ordinary and usual course of business and consistent with
      past practice or (e) assume, guarantee, endorse or otherwise become liable
      or responsible (whether directly, contingently or otherwise) for the
      obligations of any other Person;

                  (iii) other than liens on equipment pledged to secure the
      Company's equipment loan credit facility, create, incur, assume or permit
      to exist any mortgage or deed of trust, pledge, hypothecation, assignment,
      deposit arrangement, lien, charge, claim, security interest, easement or
      Encumbrance, or preference, priority or other security agreement or
      preferential arrangement of any kind or nature whatsoever (including,
      without limitation, any lease or title retention agreement, any financing
      lease having substantially the same economic effect as any of the
      foregoing, and the filing of, or agreement to give, any financing
      statement perfecting a security interest under the Uniform Commercial Code
      or comparable Law of any jurisdiction); or

                  (iv) enter into any agreement, contract, commitment or
      arrangement to do any of the foregoing, or authorize, recommend, propose
      or announce an intention to do, any of the foregoing.

      For purposes of this Note, "Indebtedness" means (i) all indebtedness for
borrowed money or for the deferred purchase price of property or services (other
than current trade liabilities incurred in the ordinary course of business and
payable in accordance with customary practices), (ii) any other indebtedness
that is evidenced by a note, bond, debenture or similar instrument, (iii) all
obligations under financing leases, (iv) all obligations in respect of
acceptances issued or created, (v) all liabilities secured by any lien on any
property and (vi) all guarantee obligations.


                                       13
<PAGE>
            (x) Stockholders Meeting. The Company shall, as promptly as
practicable, duly call, give notice of, convene and hold a meeting of its
stockholders in accordance with applicable law and its organizational documents
for the purpose of obtaining the Stockholder Approval.

      7. INVESTMENT INTENT. The Holder hereby represents and warrants to the
Borrower that it is an "accredited investor" within the meaning of Rule 501(a)
promulgated under the Securities Act.

      8. SECURITY. Payment of the Obligations is secured pursuant to the
Security Agreement.

      9. BUSINESS DAYS. If any payment is due, or any time period for giving
notice or taking action expires, on a day which is not a Business Day, the
payment shall be due and payable on, and the time period shall automatically be
extended to, the immediately succeeding Business Day, and interest shall
continue to accrue at the required rate hereunder until any such payment is
made.

      10. GOVERNING LAW; CONSENT TO JURISDICTION. THIS NOTE SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF NEW YORK, AND SHALL BIND AND INURE
TO THE BENEFIT OF THE PARTIES HERETO AND THEIR RESPECTIVE SUCCESSORS AND
ASSIGNS.

            THE BORROWER HEREBY CONSENTS TO THE EXCLUSIVE JURISDICTION OF THE
COURTS OF NEW YORK AND THE UNITED STATES OF AMERICA, IN EACH CASE LOCATED IN NEW
YORK COUNTY (THE "SELECTED COURTS") FOR ANY PROCEEDING ARISING OUT OF OR
RELATING TO THIS NOTE (AND AGREES NOT TO COMMENCE ANY PROCEEDING RELATING
THERETO EXCEPT IN SUCH COURTS) AND WAIVES ANY OBJECTION TO VENUE BEING LAID IN
ANY OF THE SELECTED COURTS WHETHER BASED ON THE GROUNDS OF FORUM NON CONVENIENS
OR OTHERWISE. THE BORROWER HEREBY AGREES THAT SERVICE OF ANY PROCESS, SUMMONS,
NOTICE OR DOCUMENT BY U.S. REGISTERED MAIL TO ITS ADDRESS SET FORTH ABOVE SHALL
BE EFFECTIVE SERVICE OF PROCESS FOR ANY ACTION, SUIT OR PROCEEDING IN NEW YORK
WITH RESPECT TO ANY MATTERS TO WHICH IT HAS SUBMITTED TO JURISDICTION IN THIS
SECTION.

      11. NOTICES. All notices provided for herein shall be delivered (a) if to
the Borrower, to it at Cosi, Inc., 242 West 36th Street, New York, NY 10018,
Attn: William D. Forrest, and (b) if to the Holder, at Charles G. Phillips, 775
Park Avenue, New York, NY 10021. All notices, requests, consents and other
communications hereunder to any party shall be deemed to be sufficient if
contained in a written instrument delivered in person or sent by telecopy,
nationally recognized overnight courier or first class registered or certified
mail, return receipt requested, postage prepaid, addressed to such party at the
address set forth in this Section 11 or such other address as may hereafter be
designated in writing by such party to the other party.

      12. MISCELLANEOUS.

            (a) Amendment; Waiver. No failure or delay on the part of the Holder
in exercising any power or right hereunder, and no course of dealing between the
Borrower and the Holder of this Note, shall operate as a waiver thereof, nor
shall any single or partial exercise of any such right or power, or any
abandonment or discontinuance of steps to enforce such a right or power,
preclude any other or further exercise thereof or the exercise of any other
right or power. No modification or waiver of any provision of this Note nor
consent to any departure by the Borrower therefrom shall in any event be
effective unless the same shall be in writing and executed by the Holder, and
then such modification, waiver or consent shall be effective only in the
specific instance and for the specific purpose for which given. No notice to or
demand on the Borrower in any case shall entitle the Borrower to any other or
further notice or demand in similar or other circumstances. No amendment to, or
modification of, any provision of this Note shall in any event be effective
unless the same shall be in writing and executed and delivered by the Borrower
and the Holder. No waiver of, or consent with respect to, any provision of this
Note shall in any event be effective unless the same shall be in writing and
executed and delivered by the party from whom such waiver or consent is


                                       14
<PAGE>
sought.

            (b) Successors and Assigns. Subject to the terms and conditions of
this Note, this Note shall inure to the benefit of the Holder of this Note and
the Borrower and their respective successors and assigns and be binding upon the
Holder of this Note and the Borrower and their respective successors and
assigns.

            (c) Entire Agreement. This Note and the Security Agreement, and the
agreements, documents and instruments executed in connection herewith and
therewith (including, without limitation, the Investment Agreement), constitute
the entire understanding between the Borrower and the Holder with respect to the
subject matter hereof and supersede any prior agreements, written or oral, with
respect thereto. The rights and remedies provided pursuant to this Note are
cumulative and are not exclusive of any rights or remedies which any party
otherwise may have at law or in equity.

            (d) Lost, Stolen, Destroyed or Mutilated Note. If this Note is lost,
stolen or destroyed, upon Borrower's receipt of a reasonably satisfactory
indemnification agreement executed by the Holder, or if this Note is mutilated,
upon the Holder's surrender of the mutilated Note to Borrower, Borrower shall
execute and deliver to the Holder a new promissory note which is identical in
form and content to this Note to replace the lost, stolen, destroyed or
mutilated Note. Such a replacement note shall be deemed a "Note" for all
purposes hereunder.

            (e) Attorneys' Fees and Costs and Other Expenses. Upon the Holder's
demand, Borrower shall reimburse the Holder for all costs and expenses,
including reasonable attorneys' fees and costs, incurred by the Holder in
connection with the exercise of any or all of the Holder 's rights and remedies
under this Note or the Security Agreement, the enforcement of any or all
Obligations, whether or not any legal proceedings are instituted by the Holder,
or the defense of any action or proceeding by Borrower or any other Person
relating to the Loan. Without limiting the generality of the immediately
preceding sentence, such costs and expenses shall include all reasonable
attorneys' fees and costs incurred by the Holder in connection with any federal
or state bankruptcy, insolvency, reorganization, or other similar proceeding by
or against Borrower which in any way affects the Holder's exercise of its rights
and remedies under the Note or the Security Agreement. Borrower's obligation to
reimburse the Holder under this Section shall include payment of interest on all
amounts expended by the Holder from the date of expenditure at the rate of
interest applicable to principal under the Note. Wherever any of the terms of
this Note or the Security Agreement provide for the payment or recovery of
costs, fees, or other expenses (including attorneys' fees and costs), such term
shall be deemed to provide for the payment or recovery of reasonable costs,
fees, expenses, and reasonable attorneys' fees and costs.

            (f) Time of the Essence. Time is of the essence in the performance
by Borrower of each provision of this Note and the Security Agreement.

            (g) Interpretation. This Note shall be construed as if drafted
jointly by the parties and no presumption or burden of proof shall arise
favoring or disfavoring any party by virtue of the authorship of any provisions
of this Note. The definitions used in this Note are applicable to the singular
as well as the plural forms of such terms and to the masculine as well as to the
feminine and neuter genders of such term. The words "hereof," "herein" and
"hereunder" and words of similar import when used in this Note shall refer to
this Note as a whole and not to any particular provision of this Note. Any
statute defined or referred to herein or in any agreement or instrument that is
referred to herein means such statute as from time to time amended, modified or
supplemented, including by succession of comparable successor statutes.

      13. DESCRIPTIVE HEADINGS. The headings appearing in this Note have been
inserted for convenience of reference only and shall be given no substantive
meaning or significance whatsoever in construing the terms and provisions of
this Note.

      14. SEVERABILITY. Should any provision of this Note be judicially declared
to be invalid, unenforceable or void, such decision will not have the effect of
invalidating or voiding the remainder of


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<PAGE>
this Note, and the parties hereto agree that the provision of this Note so held
to be invalid, unenforceable or void will be deemed to have been stricken
herefrom and the remainder will have the same force and effectiveness as if such
provision had never been included herein, provided, however the parties hereto
shall use their best efforts replace the provision so deemed to have been
stricken herefrom with a provision that the parties reasonably believe to be
valid and enforceable and which has a substantially identical economic and legal
effect as the provision so deemed to have been stricken herefrom.


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<PAGE>
            IN WITNESS WHEREOF, the Borrower has duly executed and delivered
this Note as of the date first written above.

                                        COSI, INC.


                                        BY: /s/ Mark Stickney
                                           --------------------------
                                              NAME:
                                              TITLE:


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