Document:

<PAGE>   1
                                                                   EXHIBIT 10.16

                                 AMENDMENT NO. 1
                               TO PROMISSORY NOTE
                             DATED JANUARY 27, 2000

         This Amendment to Promissory Note dated January 27, 2000 (the "Note")
issued by PrivilegeOne Networks, Inc., a Delaware corporation, to Calton, Inc.,
a New Jersey corporation, the obligations under which have been assumed by
PrivilegeOne Networks, LLC, a Delaware limited liability company.

1.       AMENDMENT. The first sentence of the second paragraph of the Note is
         hereby amended to read in its entirety as follows:

                  "This Promissory Note shall bear interest at a rate of ten
                  percent (10%) per annum. Interest shall be payable quarterly
                  on the fifteenth (15th) day of each calendar quarter
                  commencing with the quarter that begins on October 1, 2001."

2.       WAIVER. Lender hereby waives its rights with respect to defaults due to
         the failure to make payments due under the Note which occurred prior to
         the execution of this Amendment No. 1.

         IN WITNESS WHEREOF, the parties have executed this Amendment this 9th
day of February, 2001.

                                                     PrivilegeOne Networks, Inc.

                                                 By:
                                                    ---------------------------

                                                     PrivilegeOne Networks, LLC

                                                 By:
                                                    ---------------------------

                                                     Calton, Inc.

                                                 By:
                                                    ---------------------------<PAGE>   1
                                                                   EXHIBIT 10.17

                       ASSIGNMENT AND ASSUMPTION AGREEMENT

         This ASSIGNMENT AND ASSUMPTION AGREEMENT (this "Agreement") is
delivered and executed as of February 2, 2000 by and between PrivilegeOne
Networks, Inc., a Delaware corporation ("Assignor"), and PrivilegeOne Networks,
L.L.C., a Delaware limited liability company ("Assignee").

                              W I T N E S S E T H:
                               - - - - - - - - - -

         WHEREAS, Assignor has (i) entered into certain Employment and
Non-Competition Agreements with each of Steven R. Tetreault, Thomas E. Van
Fechtmann and Thomas C. Corley, each dated as of January 27, 2000 (each an
"Employment Agreement" and, collectively, the "Employment Agreements") and (ii)
executed a certain Promissory Note in the original principal amount of
$1,500,000.00 dated as of January 27, 2000 (the "Promissory Note");

         WHEREAS, (i) Section 16 of each Employment Agreement permits the
Assignor to assign its rights and obligations under such Employment Agreement to
a business entity that succeeds to all or substantially all of the Assignor's
business provided such succeeding business entity assumes the Assignor's
obligations under such Employment Agreement and (ii) the Promissory Note permits
a third party to assume the payment thereof;

         WHEREAS, Assignee will succeed to all or substantially all of
Assignor's business and will assume (i) all of Assignor's obligations under the
Employment Agreements and (ii) the payment of the Promissory Note;

         NOW, THEREFORE, in consideration of the mutual promises and agreements
contained herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

         1. Effective as of the date of this Agreement, Assignor hereby assigns,
transfers and conveys to Assignee (i) all of Assignor's rights and obligations
under the Employment Agreements (ii) all rights and obligations under the
Promissory Note and (iii) the rights and obligations under the agreements and
contracts identified on Schedule A hereto (the "Other Agreements"). Effective as
of the date of this Agreement, Assignee hereby assumes (i) all of the Assignor's
rights and obligations under the Employment Agreements, (ii) all rights and
obligations under the Promissory Note and (iii) all rights and obligations under
the Other Agreements.

         2. Assignor and Assignee each hereby further undertake to use all
reasonable efforts to take, or cause to be taken, any further action necessary

<PAGE>   2

or desirable to carry out the purposes of this Agreement and to execute, deliver
or file, or cause to be executed, delivered or filed, all necessary or desirable
documentation.

         3. All of the rights and remedies of Assignor and Assignee,
respectively, under this Agreement shall inure to the benefit of their
respective successors and assigns forever.

         4. This Agreement shall be governed by and construed in accordance with
the laws of the State of Delaware without giving effect to any conflicts of laws
principles.

         5. This Agreement may be executed in one or more counterparts, each of
which shall be deemed an original and all of which together shall constitute one
original instrument.

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

                                       PRIVILEGEONE NETWORKS, INC.

                                       By:
                                          --------------------------------------
                                            Name: Stephen R. Tetreault
                                            Title: President

                                       PRIVILEGEONE NETWORKS, L.L.C.

                                       By:   Taytrowe Van Fechtmann World
                                             Companies, Inc., Member

                                            By:
                                               ---------------------------------
                                                 Name:  Steven R. Tetreault
                                                 Title:  President

                                             By:  Calton, Inc., Member

                                            By:
                                               ---------------------------------
                                                 Name:  Anthony J. Caldarone
                                                 Title:  President

                                             By:  3DThink, Inc., Member

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

                                      -2-
<PAGE>   3

         Each of the undersigned hereby consents to the assignment, as of the
date of this Agreement, of his Employment Agreement with PrivilegeOne Networks,
Inc. to PrivilegeOne Networks, L.L.C. and the assumption, as of the date of this
Agreement, by PrivilegeOne Networks, L.L.C. of all obligations of PrivilegeOne
Networks, Inc. thereunder.

--------------------------------
Steven R. Tetreault

--------------------------------
Thomas E. Van Fechtmann

--------------------------------
Thomas C. Corley

         Calton, Inc. hereby acknowledges that, as of the date of this
Agreement, PrivilegeOne Networks, L.L.C. has assumed all of the obligations of
PrivilegeOne Networks, Inc. under the Promissory Note; however such description
does not terminate the liability of PrivilegeOne Networks, Inc. under such
promissory note.

CALTON, INC.

--------------------------------
Name:  Anthony J. Caldarone
Title:  President

                                      -3-<PAGE>   1
                                                                   EXHIBIT 10.18

                                                                        ANNEX II

                                     SECOND
                                 PROMISSORY NOTE

                           PRIVILEGEONE NETWORKS, LLC

$1,450,000.00                                                   February 9, 2001

         FOR VALUE RECEIVED, PrivilegeOne Networks, LLC, a limited liability
company formed under the laws of the State of Delaware (the "Borrower") whose
mailing address is 20 Fry Pond Road, West Greenwich, Rhode Island 02817 promises
to pay to the order of Calton, Inc. (the "Lender"), at the office of the Lender
at 125 Half Mile Road, Suite 206, Red Bank, New Jersey 07701, or at such other
place as the Lender may from time to time designate to the Borrower in writing,
the principal amount of One Million Four Hundred Fifty Thousand Dollars
($1,450,000) or so much thereof as may be advanced to Borrower hereunder
together with interest on so much thereof as is or may be from time to time
outstanding and unpaid, at the rate hereinafter set forth and for any other
Indebtedness owing to the Lender by the Borrower in lawful money of the United
States of America, which shall at the time of payment be legal tender in payment
of debts, dues, public and private. All capitalized terms used in this
Promissory Note shall have the meaning ascribed to them herein.

         This Promissory Note shall bear interest at a rate of ten percent (10%)
per annum. Interest shall be payable quarterly, in arrears, on the fifteenth
(15th) day following the end of each calendar quarter commencing with the
quarter that begins on July 1, 2001. The first interest payment will therefore
be due on October 15, 2001. Principal and all unpaid interest shall be due and
payable on January 27, 2004.

         The Borrower may make prepayments of principal, interest, or principal
and interest without penalty. Upon the occurrence of an Event of Default, the
Borrower agrees that the Lender shall have all the rights and remedies set forth
in this Promissory Note, including, without limitation, the rights of
acceleration set forth herein. If an Event of Default shall occur, interest
shall accrue from the date of the Event of Default and during the continuance of
the Event of Default at a rate equal to the lower of fourteen percent (14%) per
annum or the highest rate permitted by law.

         The Borrower may cancel this Promissory Note and terminate the
provisions hereof and the related Agreements of Guaranty of even date herewith
at any time by (1) paying all sums then payable hereunder and (2) notifying the
Lender that this Promissory Note is terminated.

<PAGE>   2

                ARTICLE 1: EVENTS OF DEFAULT; RIGHTS AND REMEDIES

         1.1 EVENTS OF DEFAULT. The occurrence of any of the following events
(each, an "Event of Default") shall terminate any obligation on the part of the
Lender to disburse Loan Proceeds and, at the option of the Lender, shall make
this Promissory Note and the entire Indebtedness immediately due and payable
(provided, however, that in the case of an Event of Default under Subsection (e)
all amounts owing under this Promissory Note shall automatically and immediately
become due and payable without any action by or on behalf of the Lender), and
the Lender may exercise any and all rights and remedies for the collection of
any amounts outstanding hereunder and take whatever action it deems necessary to
secure itself all without notice of default, presentment, or demand for payment,
protest, or notice of nonpayment or dishonor, or other notices or demands of any
kind or character:

         (a) Failure of the Borrower to pay within ten (10) days of the date
when due, whether by acceleration or otherwise, any of the Indebtedness in
accordance with this Promissory Note.

         (b) Any representation or warranty of PrivilegeOne Networks, Inc. set
forth in the Stock Acquisition Agreement or any representation of Borrower set
forth in this Promissory Note or any Advance Request (as defined in Section
3.1.4 herein), or in connection with any transaction contemplated by any such
document, shall prove in any material respect to have been false or misleading
when made.

         (c) Any default by the Borrower in the performance or compliance with
the covenants, promises, conditions or provisions of this Promissory Note or the
Initial Promissory Note.

         (d) The failure to pay when due, or failure to perform or observe any
other obligation or condition with respect to any of the following obligations
to any Person, beyond any period of grace under the instrument creating such
obligation: (i) any indebtedness for borrowed money or for the deferred purchase
price of property in excess of $25,000.00, (ii) any obligations under leases
which have or should have been characterized as capitalized leases, as
determined in accordance with GAAP, or (iii) any contingent liabilities, such as
guaranties, for the obligations of others relating to indebtedness for borrowed
money or for the deferred purchase price of property or services or relating to
obligations under leases which have or should have been characterized as
capitalized leases, as determined in accordance with GAAP.

         (e) The Borrower applies for or consents to the appointment of a
trustee or receiver for any part of its respective properties; any bankruptcy,
reorganization, debt arrangement, dissolution, or liquidation proceeding is
commenced or consented to by the Borrower, or any application for appointment of
a receiver or a trustee, or any proceeding for bankruptcy, reorganization, debt
management, or liquidation is filed for or commenced against the Borrower, and
is not withdrawn or dismissed within sixty (60) days thereafter; provided,
however, that within said sixty (60) day period the Lender shall have no
obligation to disburse the Loan Proceeds.

         (f) Failure of the Borrower to comply with any other provision of this
Promissory Note or the Operating Agreement not constituting an Event of Default
under any of the preceding provisions of this Section 1.1, and such failure
continues for thirty (30) days after notice to the Borrower from the Lender.

                                      -2-
<PAGE>   3

         (g) Any lien for labor, services, materials, or otherwise is filed
against any property of the Borrower or any interest of the Borrower or the
Lender therein and is not removed within thirty (30) days thereafter; PROVIDED,
HOWEVER, the Borrower will not be deemed to be in default under this
subparagraph if and so long as the Borrower: (i) contests in good faith the
validity or amount of any asserted lien and diligently prosecutes or defends an
action appropriate to obtain a binding determination of the disputed matter and
such contest shall have the effect of preventing the sale or forfeiture of any
property of the Borrower or any interest of the Borrower or the Lender therein;
and (ii) provides the Lender with such security as the Lender may require to
protect the Lender against all loss, damage, and expense, including attorneys'
fees, which it might incur if the asserted lien is determined to be valid.

         (h) Without having first obtained the written consent of the Lender,
the Borrower transfers, sells, conveys, assigns, or further encumbers all or any
portion of the Borrower's interest in any property, except as in the ordinary
course of Borrower's business.

         (i) Upon the commencement of any legal or governmental actions,
proceedings or investigations to which the Borrower is a party or to which any
property of the Borrower is subject and which could result in any material
adverse change in the business, operations, properties or financial condition or
performance of the Borrower, unless: (i) dismissed with thirty (30) days of
commencement, or (ii) if and so long as Borrower contests in good faith the
validity or amount of any asserted lien and diligently prosecutes or defends an
action appropriate to obtain a binding determination of the disputed matter and
such contest shall have the effect of preventing the sale or forfeiture of any
property of the Borrower or any interest of the Borrower or the Lender therein;
and provides the Lender with such security as the Lender may require to protect
the Lender against all loss, damage, and expense, including attorney's fees,
which Lender might incur if the asserted lien is determined to be valid.

         (j) A breach of any of the covenants set forth in the Guaranty of even
date herewith issued to Lender by Steven R. Tetreault, Cindy H. Tetreault,
Thomas E. Van Fechtmann, Stacey Van Fechtmann or Thomas Corley.

         1.2 NO ADVANCES. The Lender shall have no obligation to disburse the
Loan Proceeds if an Event of Default shall occur and be continuing.

         1.3 BORROWER'S BOARD OF DIRECTORS. The Lender shall have the right to
appoint a majority of the members of the Borrower's board of directors due to
the occurrence of an Event of Default under Subsection (a) of Section 1.1 of
this Article 1 if such default continues for thirty (30) days after notice of
such default is given to Borrower.

         1.4 RIGHTS AND REMEDIES. In addition to the remedies set forth in
Sections 1.1 through 1.3 of this Promissory Note, upon the occurrence of an
Event of Default, and until cured (provided such cure is effected prior to the
Lender giving the Borrower written notice of the election by the Lender to
accelerate all amounts owing under this Promissory Note on account of such Event
of Default), the Lender shall be entitled to exercise all the rights and
remedies provided by any applicable law, including, without limitation, the

                                      -3-
<PAGE>   4

Uniform Commercial Code as enacted in the State of New Jersey. Each and every
right or remedy granted to the Lender pursuant to this Promissory Note, or
allowed the Lender by law or equity, shall be cumulative. Failure or delay on
the part of the Lender to exercise any such right or remedy shall not operate as
a waiver thereof. Any single or partial exercise by the Lender of any such right
or remedy shall not preclude any future exercise thereof or the exercise of any
other right or remedy.

                        ARTICLE 2: AFFIRMATIVE COVENANTS

         From and after the date of this Promissory Note and until the
Indebtedness is indefeasibly paid, in full, in cash, and the Lender has no
obligation to make any Advances hereunder, the Borrower agrees that it will
observe and comply with the following covenants for the benefit of the Lender.

         2.1 USE OF LOAN PROCEEDS. The Loan Proceeds made available to Borrower
pursuant to this Promissory Note shall be utilized by Borrower solely to meet
its working capital requirements to support the development of its PrivilegeOne
Credit Card Program product and Borrower shall furnish Lender with such detailed
documentation and information regarding Borrower's working capital requirements
as Lender may request while this Promissory Note is outstanding. Notwithstanding
anything to the contrary set forth herein, $100,000 advanced upon the
achievement of the Agreement Milestone (as defined below), $150,000 advanced
upon the achievement of the Solicitation Milestone (as defined below) and
$100,000 advanced upon the achievement of the Implementation Milestone (as
defined below) shall be used for reimbursement of expenses to the issuer or
proposed issuer of the PrivilegeOne Credit Card.

         2.2 FUTURE DEBT. Borrower will not issue, incur, create, assume,
guarantee or otherwise become liable for any other indebtedness for borrowed
money unless such other indebtedness is subordinated in right of payment to this
Indebtedness under this Promissory Note.

                        ARTICLE 3: CONDITIONS TO ADVANCES

         3.1 PROPOSED ADVANCES. The Lender agrees that subject to the terms and
conditions of this Note, it shall make advances to Borrower in accordance with
the following schedule and upon occurrence of the following events; provided,
that such events occur or have occurred by the date indicated and provided
further, that the Lender shall have no obligation to make advances upon the
occurrence of an event described below by the prescribed date if any of the
events listed above such event in the table set forth below have not previously
occurred:
<TABLE>
<CAPTION>

                                Event                                         Date               Advance Amount
                                -----                                         ----               --------------
<S>                                                                           <C>                      <C>
Execution of this Note                                                        2-06-01                  $200,000

Execution of definitive Co-Brand Credit Card Program Agreement with           2-15-01                  $350,000
Fleet Credit Card Services, L.P. (the "Fleet Agreement") upon terms
and reasonably satisfactory to Lender (the "Agreement Milestone")

Enrollment of at least 20 automobile dealers in Borrower Credit Card          2-28-01       Dollar for Dollar
program with contract revenues of not less than $180,000 and                                per dealer deposit
nonrefundable deposits of not less than $90,000                                             up to $90,000

</TABLE>

                                      -4-
<PAGE>   5

<TABLE>
<CAPTION>

                                Event                                         Date               Advance Amount
                                -----                                         ----               --------------
<S>                                                                           <C>                      <C>
Enrollment of at least 20 automobile dealers in Borrower Credit Card          3-15-01                  $360,000
Program with non-refundable deposits of not less than 50% of dealer
commitment out of no more than 40 solicitation calls to dealers
identified on a list approved by Lender (the "Solicitation Milestone)

Implementation Date (as defined in Fleet Agreement) occurs (the               4-01-01                  $450,000
"Implementation Milestone")
</TABLE>

Subject to Section 3.2 below, advances will be made within ten (10) days of the
applicable event upon written request from Borrower.

         3.2 CONDITIONS TO LOAN. The Lender's obligation to make the Loan and to
disburse any of the Loan Proceeds is subject to the reasonable satisfaction of
the Lender, of each of the following conditions precedent:

                  3.1.1 LOAN DOCUMENTS; OTHER DOCUMENTS. The Lender shall have
received duly executed originals of this Promissory Note, guaranties in form
reasonably satisfactory to Lender from the Guarantors and such other instruments
and documents contemplated herein and therein, as appropriate, including written
evidence reasonably satisfactory to it that the applicable event described in
Section 3.1 has occurred by the date indicated.

                  3.1.2 FURTHER ASSURANCES. The Borrower shall have provided
and/or executed and delivered to the Lender, in form and substance reasonably
satisfactory to the Lender, such further documents and instruments as the Lender
may in the Lender's discretion reasonably request.

                  3.1.3 NO ADVERSE CHANGE. There shall have been no material
adverse change in the financial condition, results of operations, business or
prospects of Borrower.

                  3.1.4 ADVANCE REQUEST. Should Borrower at any time wish to
request the disbursement of additional monies from Lender or to request an
increase in the amount of any disbursement under the terms of this Promissory
Note, the Borrower shall deliver to the Lender, no later than ten (10) Business
Days preceding the requested disbursement date, a request (an "Advance
Request"), in form and substance satisfactory to the Lender, stating the dollar
amount of the requested Advance, the specific purpose for which the Advance is
being requested and such details respecting the intended utilization of the
Advance as Lender may require.

                  3.1.5 DEFAULT. No Event of Default shall have occurred and be
continuing, nor shall an Event of Default result from the making of the Advance.

                                      -5-
<PAGE>   6

                               ARTICLE 4. NOTICES

         All notices, requests, and demands required or permitted under the
terms of this Promissory Note shall be in writing and (a) shall be addressed as
set forth below or at such other address as either party shall designate in
writing, (b) shall be deemed to have been given or made: (i) if delivered
personally, immediately upon delivery, (ii) if by telex, telegram or facsimile
transmission, immediately upon sending and upon confirmation of receipt, (iii)
if by nationally recognized overnight courier service with instructions to
deliver the next Business Day, one (1) Business Day after sending, and (iv) if
by United States Mail, certified mail, return receipt requested, five (5) days
after mailing.

       4.1      IF TO THE BORROWER:

                c/o Taytrowe Van Fechtmann World Companies, LLC
                20 Fry Pond Road
                West Greenwich, Rhode Island  02817
                Fax No.:  (401) 397-8332
                Attention: Steven R. Tetreault, President

                With a copy to:

                Thomas R. Noel, Esq.
                COUNSELOR AT LAW, P.C.
                50 South Main Street
                Providence, RI  02903
                Fax No. (401) 621-5688

                IF TO THE LENDER TO:

                Calton, Inc.
                125 Half Mile Road
                Suite 206
                Red Bank, New Jersey  07701-6749
                Fax No.:  (732)  212-1290
                Attention:  Anthony J. Caldarone, President

                With a copy to:

                Philip D. Forlenza, Esq.
                Giordano, Halleran & Ciesla, P.C.
                P.O. Box 190
                Middletown, New Jersey  07748
                Fax No.:  (732) 224-6599

         THIS PROMISSORY NOTE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE APPLICABLE LAWS OF THE STATE OF NEW JERSEY AND THE UNITED STATES OF
AMERICA FROM TIME TO TIME IN EFFECT, WITHOUT GIVING EFFECT TO ANY OTHERWISE
APPLICABLE RULES CONCERNING CONFLICTS OF LAWS.

                                      -6-
<PAGE>   7

         BORROWER IRREVOCABLY AGREES THAT ANY LITIGATION WITH RESPECT TO THIS
PROMISSORY NOTE OR ENFORCEMENT OF ANY JUDGMENT OBTAINED AGAINST BORROWER FOR
BREACH OF THIS PROMISSORY NOTE MAY BE BROUGHT IN THE COURTS OF THE STATE OF NEW
JERSEY AND IN THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF NEW JERSEY
(COLLECTIVELY, THE "SPECIFIED COURTS") (IF APPLICABLE SUBJECT MATTER
JURISDICTIONAL REQUIREMENTS ARE PRESENT), AS LENDER MAY ELECT; AND, BY EXECUTION
AND DELIVERY OF THIS PROMISSORY NOTE, BORROWER IRREVOCABLY SUBMITS TO SUCH
JURISDICTION. BORROWER AGREES THAT IT SHALL MAINTAIN A DULY APPOINTED AGENT FOR
SERVICE OF SUMMONS AND OTHER LEGAL PROCESS AS LONG AS BORROWER REMAINS OBLIGATED
UNDER THIS PROMISSORY NOTE AND SHALL KEEP LENDER ADVISED IN WRITING OF THE
IDENTITY AND LOCATION OF SUCH AGENT. THE RECEIPT BY SUCH AGENT AND/OR BY
BORROWER OF SUCH SUMMONS OR OTHER LEGAL PROCESS IN ANY SUCH L ITIGATION SHALL BE
DEEMED PERSONAL SERVICE AND ACCEPTANCE BY BORROWER FOR ALL PURPOSES OF SUCH
LITIGATION. BORROWER AGREES THAT A FINAL JUDGMENT IN ANY SUCH ACTION OR
PROCEEDING SHALL BE CONCLUSIVE AND MAY BE ENFORCED IN OTHER JURISDICTIONS BY
SUIT ON THE JUDGMENT OR IN ANY OTHER MANNER PROVIDED BY LAW.

         The Borrower, the Guarantors, and any sureties, or endorsers hereof
hereby jointly and severally waive presentment for payment, demand, protest,
diligence in collection, and notice of dishonor and nonpayment of this
Promissory Note, and all defenses on the ground of delay, suretyship, release of
any party liable for payment hereof, or of any extension of time for the payment
hereof (including any right to notice of any of the foregoing) which may be
hereafter given by the holder or holders of this Promissory Note from time to
time (the "Holder") to them or either of them or to anyone who has assumed the
payment of this Promissory Note, and it is specifically agreed that the
obligations of said Borrower, Guarantors, sureties or endorsers shall not be in
any way affected or altered to the prejudice of the Holder hereof by reason of
the assumption of payment of the same by any other person or entity.

         At the option of the Holder, the unpaid balance of this Promissory Note
and all other obligations of the Borrower to the Holder, direct or indirect,
absolute or contingent, now existing or hereafter arising, may become
immediately due and payable without notice or demand upon the occurrence of an
Event of Default under this Promissory Note, and the Borrower agrees that upon
such occurrence the Holder shall have and be entitled to assert all the other
rights and remedies set forth in this Promissory Note, including, without
limitation, the rights and remedies set forth herein. In addition, the Holder
shall have the right to recover all costs of collection and enforcement of this
Promissory Note as provided herein.

                                  DEFINITIONS:

         1. BUSINESS DAY: any day (a) other than a Saturday or Sunday and other
than a day which is a Federal legal holiday or a legal holiday for banks in the
state of New Jersey.

         2. GUARANTORS: Taytrowe Van Fechtmann World Companies, Inc., a Delaware
corporation with offices located at 20 Fry Pont Road, West Greenwich, Rhode
Island 02817, 3D Think, Inc., a Delaware corporation with offices located at 20

                                      -7-
<PAGE>   8

Fry Pont Road, West Greenwich, Rhode Island 02817 and each of (i) Steven R.
Tetreault and his spouse, (ii) Thomas Van Fechtmann and his spouse and (iii)
Thomas Corley.

         3. INDEBTEDNESS: all amounts due and owing under this Promissory Note.

         4. INITIAL PROMISSORY NOTE: the Promissory Note dated January 27, 2000
issued by PrivilegeOne Networks, Inc. to Calton, Inc., the obligations under
which have been assumed by Borrower.

         5. LOAN PROCEEDS: monies advanced to Borrower pursuant to this
Promissory Note.

         6. OPERATING AGREEMENT. The Operating Agreement of PrivilegeOne
Networks, LLC dated as of February 2, 2000 among Calton, Inc., Taytrowe Van
Fechtmann World Companies, Inc. and 3D Think, Inc., as such agreement may be
amended from time to time.

         7. PERSON: any individual, corporation, association, partnership,
trust, organization, government, governmental agency, or other entity.

         8. STOCK ACQUISITION AGREEMENT: the Stock Acquisition Agreement by and
among Taytrowe Van Fechtmann World Companies, Inc., PrivilegeOne Networks, Inc.
and Calton, Inc. dated as of January 27, 2000.

         IN WITNESS WHEREOF, the Borrower has executed this Promissory Note on
this 9th day of February, 2001.

ATTEST:                              PRIVILEGEONE NETWORKS, LLC.,
                                     a Delaware limited liability company

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

                                      -8-

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