Document:

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                                                                   EXHIBIT 10.60

                           NEGOTIABLE PROMISSORY NOTE

$150,000                       DECEMBER 23, 2003                   ANDOVER,
                                                                   MASSACHUSETTS

         1.       FOR VALUE RECEIVED, NAVISITE, INC., A DELAWARE CORPORATION
("BORROWER"), PROMISES TO PAY TO THE ORDER OF U.S. MANAGERS REALTY, INC., A
CALIFORNIA CORPORATION ("LENDER"), AT 2101 ROSECRANS AVENUE, SUITE 5252, El
SEGUNDO, CALIFORNIA 90245, OR AT SUCH OTHER PLACE AS MAY BE DESIGNATED IN
WRITING BY LENDER, THE PRINCIPAL SUM OF ONE HUNDRED FIFTY THOUSAND DOLLARS
($150,000), TOGETHER WITH INTEREST THEREON AT THE RATE OF ELEVEN PERCENT (11%)
PER ANNUM, AND SUCH OTHER CHARGES AS MAY BE DUE IN CONNECTION WITH THIS NOTE AS
DESCRIBED BELOW.

         2.       BORROWER IS THE TENANT AND 400 RIVER LIMITED PARTNERSHIP IS
THE LANDLORD UNDER A LEASE, DATED AS OF 5/14/1999 (AS AMENDED, THE "LEASE"), OF
PREMISES LOCATED AT 400 MINUTEMAN ROAD, ANDOVER, MA 01810. BORROWER HAS ELECTED
TO CONSTRUCT TENANT IMPROVEMENTS IN AND FOR THE SECOND FLOOR AREA OF THE
PREMISES (THE "TENANT IMPROVEMENTS"). PURSUANT TO A LETTER AGREEMENT, DATED ON
OR ABOUT THE DATE HEREOF, BETWEEN BORROWER AND LENDER (AS AMENDED, THE "LETTER
AGREEMENT"), AND SUBJECT TO THE TERMS AND CONDITIONS THEREOF, LENDER HAS AGREED
ON BORROWER'S BEHALF TO ENTER INTO A CONSTRUCTION CONTRACT WITH CARR
ENTERPRISES, LTD. FOR, SUPERVISE CONSTRUCTION OF, AND LOAN A TOTAL OF ONE
HUNDRED FIFTY THOUSAND DOLLARS ($150,000) TOWARDS THE COST OF, CERTAIN OF THE
TENANT IMPROVEMENTS. THE AMOUNT SO LOANED BY LENDER IS TO BE REPAID AS SET FORTH
IN THIS NOTE.

         3.       BORROWER ALSO HAS ENTERED INTO A $2,200,000 PROMISSORY NOTE IN
FAVOR OF LENDER, DATED __DECEMBER 1, 2003 (AS AMENDED, THE "$2.2 MILLION NOTE"),
TO EVIDENCE OTHER AMOUNTS ADVANCED BY LENDER ON BORROWER'S BEHALF. THE $2.2
MILLION NOTE, THE LEASE AND THE LETTER AGREEMENT SOMETIMES ARE REFERRED TO
COLLECTIVELY AS THE "OTHER AGREEMENTS."

         4.       NOTWITHSTANDING ANYTHING TO THE CONTRARY IN THIS NOTE, THE
OTHER AGREEMENTS OR ELSEWHERE: (a) LENDER WILL NOT BE REQUIRED TO ADVANCE OR
LOAN ANY FUNDS TO BORROWER UNDER THIS NOTE OR OTHERWISE UNLESS THE TERMS AND
CONDITIONS OF THE LETTER AGREEMENT HAVE BEEN SATISFIED AND BORROWER IS NOT IN
DEFAULT THEREUNDER OR UNDER ANY OF THE OTHER AGREEMENTS; (b) IF LENDER FUNDS
PURSUANT TO THE LETTER AGREEMENT IT WILL BE DEEMED TO HAVE FUNDED THE ENTIRE ONE
HUNDRED FIFTY THOUSAND DOLLARS ($150,000) ON MARCH 1, 2004, EVEN IF ALL OR SOME
PORTION IS FUNDED BEFORE OR AFTER THAT DATE; AND (c) A DEFAULT BY BORROWER UNDER
THIS NOTE AUTOMATICALLY WILL BE DEEMED TO BE A DEFAULT BY BORROWER UNDER THE
OTHER AGREEMENTS, AND A DEFAULT BY BORROWER UNDER ANY OF THE OTHER AGREEMENTS
AUTOMATICALLY WILL BE DEEMED TO BE A DEFAULT BY BORROWER UNDER THIS NOTE, AND IN
EITHER CASE LENDER AND LANDLORD EACH WILL HAVE THE RIGHT TO EXERCISE ANY OR ALL
OF THEIR AVAILABLE RIGHTS AND REMEDIES UNDER THE APPLICABLE DOCUMENTS, ALL OF
WHICH ARE CUMULATIVE AND NOT EXCLUSIVE (AND THE LANDLORD UNDER THE LEASE IS
HEREBY MADE A THIRD PARTY BENEFICIARY FOR THESE PURPOSES). IF BORROWER DEFAULTS
OR IS DEEMED TO HAVE DEFAULTED HEREUNDER, AMONG ITS OTHER RIGHTS LENDER WILL
HAVE THE RIGHT, BUT NOT THE OBLIGATION, TO ACCELERATE ALL UNPAID INSTALLMENTS OF
PRINCIPAL AND INTEREST HEREUNDER. NOTWITHSTANDING ANYTHING TO THE CONTRARY
HEREIN, BORROWER WILL BE PERMITTED A GRACE PERIOD OF SEVEN (7) DAYS AFTER NOTICE
FROM LENDER TO SATISFY ANY PAYMENTS DUE OR PAYABLE HEREUNDER.

         5.       PRINCIPAL AND INTEREST UNDER THIS NOTE WILL BE PAID BY
BORROWER IN EQUAL MONTHLY INSTALLMENTS OF FOUR THOUSAND NINE HUNDRED TEN DOLLARS
AND EIGHTY-ONE CENTS ($4,910.81) EACH STARTING ON APRIL 1, 2004 AND ON THE FIRST
DAY OF EACH SUCCESSIVE MONTH THEREAFTER FOR THE NEXT THIRTY-FIVE (35) MONTHS
THROUGH AND INCLUDING MARCH 1, 2007. ALL AMOUNTS PAID BY BORROWER FIRST WILL BE
CREDITED TO CHARGES OTHER THAN INTEREST OR PRINCIPAL DUE UNDER THIS NOTE, THEN
TO INTEREST DUE AND THEN TO PRINCIPAL. ALL AMOUNTS DUE WILL BE PAID IN U.S.
DOLLARS AND IN IMMEDIATELY AVAILABLE FUNDS, AND AMOUNTS NOT PAID WHEN DUE WILL
BEAR INTEREST AT THE RATE OF ELEVEN PERCENT (11%) PER ANNUM FROM THE DATE DUE
UNTIL PAID IN FULL. BORROWER WILL HAVE THE RIGHT TO PARTIALLY OR FULLY PREPAY
THIS NOTE AT ANY TIME.

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         6.       IF FOR ANY REASON ANY AMOUNTS DUE UNDER THIS NOTE ARE DEEMED
TO BE USURIOUS OR UNLAWFUL, THEN THOSE AMOUNTS DUE SHALL BE DEEMED REDUCED TO
THE LEGAL MAXIMUM AND ADDITIONAL AMOUNTS COLLECTED SHALL BE DEEMED TO HAVE BEEN
APPLIED TO PRINCIPAL OR, IF SUCH APPLICATION IS UNLAWFUL, SHALL BE CREDITED
AGAINST AMOUNTS NEXT DUE FROM BORROWER OR BE REFUNDED TO BORROWER.

         7.       BORROWER IRREVOCABLY WAIVES ALL RIGHT TO A TRIAL BY JURY IN
ANY PROCEEDING INSTITUTED BY OR AGAINST BORROWER RELATING TO THIS NOTE. BORROWER
IRREVOCABLY WAIVES: PRESENTMENT; PROTEST; DEMAND AND ALL DEFENSES,
COUNTERCLAIMS, OFFSETS, CREDITS OR OTHER DEFENSES TO THIS NOTE OR PAYMENT
HEREUNDER; NOTICE OF DISHONOR; NOTICE OF ACCELERATION; NOTICE OF PROTEST AND
NONPAYMENT; DILIGENCE IN TAKING ANY ACTION TO COLLECT ANY SUMS OWING UNDER THIS
NOTE; AND ALL OTHER NOTICES OR DEMANDS IN CONNECTION WITH THE DELIVERY,
ACCEPTANCE, PERFORMANCE, DEFAULT OR ENFORCEMENT OF THIS NOTE. THIS NOTE AND
BORROWER'S OBLIGATIONS HEREUNDER ARE AND WILL CONTINUE TO BE ABSOLUTE,
UNCONDITIONAL, VALID AND ENFORCEABLE BY LENDER REGARDLESS OF ANY AGREEMENTS OR
CIRCUMSTANCES OF ANY NATURE UNDER THE OTHER AGREEMENTS (INCLUDING, WITHOUT
LIMITATION, ACTUAL OR ALLEGED CLAIMS AGAINST OR DEFAULTS BY LENDER OR OTHER
PARTIES UNDER ANY OF THE OTHER AGREEMENTS), AND THE TERMS OF THE OTHER
AGREEMENTS ARE ENTIRELY UNAFFECTED BY THIS NOTE AND THE ACTIONS OF THE PARTIES
HEREUNDER (EXCEPT FOR THE CROSS-DEFAULT PROVISIONS IN SECTION 4 ABOVE).

         8.       TIME IS OF THE ESSENCE. THIS NOTE WILL BE CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE LOCAL, INTERNAL LAWS OF THE COMMONWEALTH OF
MASSACHUSETTS APPLICABLE TO AGREEMENTS ENTERED INTO AND TO BE PERFORMED WHOLLY
THEREIN. THE PARTIES CONSENT AND SUBMIT TO THE SOLE AND EXCLUSIVE JURISDICTION
AND VENUE OF ANY FEDERAL OR STATE COURT IN BOSTON, MASSACHUSETTS, AND AGREE NOT
TO CONTEST SUCH JURISDICTION AND VENUE. BORROWER WILL PAY TO LENDER ALL
REASONABLE COSTS AND EXPENSES, INCLUDING, WITHOUT LIMITATION, REASONABLE
ATTORNEYS=FEES AND COSTS AND COSTS OF DISCOVERY, INCURRED BY LENDER IN ANY
SUIT, ACTION, OR PROCEEDING TO COLLECT SUMS OWED OR ENFORCE OR INTERPRET
LENDER'S RIGHTS UNDER OR IN CONNECTION WITH THIS NOTE. THIS NOTE IS AN
INTEGRATED AGREEMENT. THIS NOTE IS BINDING ON BORROWER AND ITS SUCCESSORS AND
ASSIGNS AND INURES TO THE BENEFIT OF LENDER, LANDLORD UNDER THE LEASE (FOR THE
PURPOSES STATED HEREIN), AND THEIR RESPECTIVE SUCCESSORS AND ASSIGNS. IF ANY
PORTION OF THIS NOTE IS HELD TO BE INVALID OR UNENFORCEABLE, THE OTHER
PROVISIONS OF THIS NOTE WILL REMAIN IN FULL FORCE AND EFFECT. ALL WAIVERS MUST
BE IN WRITING, SPECIFY THE ACT OR OMISSION WAIVED AND BE SIGNED BY THE PARTY
CHARGED WITH THE WAIVER. THIS NOTE MAY NOT BE AMENDED EXCEPT BY WRITTEN
AGREEMENT SIGNED BY BORROWER AND LENDER.

         IN WITNESS WHEREOF, BORROWER, INTENDING TO BE LEGALLY BOUND, HAS
EXECUTED THIS NOTE UNDER SEAL AS OF THE DATE FIRST SET FORTH ABOVE.

NaviSite, INC,

/s/ Arthur P. Becker
------------------------
NAME: ARTHUR P. BECKER
TITLE: CHIEF EXECUTIVE OFFICER & PRESIDENT
AUTHORIZED SIGNATURE
DATE: DECEMBER 23, 2003

                                                                               2<PAGE>
                                                                   Exhibit 10.61

                                                              January 16, 2004

Mr. Arthur Becker
Chief Executive Officer
NAVISITE, INC.
400 Minuteman Road
Andover, MA  01810

         Re: Extension of Term

         In connection with that certain Loan and Security Agreement (the
"Agreement"), dated as of January 29, 2003 between Atlantic Investors, LLC
("Lender") and NaviSite, Inc. ("Borrower"), this letter serves to notify
Borrower that any and all Credit Advances under the Agreement made prior to, or
following the date of this letter shall be due on or before the earlier of (i)
August 1, 2004 or (ii) five (5) business days following the closing of a
financing transaction or disposition pursuant to which the Borrower receives
gross proceeds of $13 million.

         If you have any questions, please feel free to contact me.

                                               Sincerely yours,

                                               ATLANTIC INVESTORS, LLC

                                               By:  Unicorn Worldwide Holdings
                                                 Limited, a managing member

                                               By: /s/ Simon H. Cooper
                                               Name: Simon H. Cooper
                                               Title:  Director<PAGE>

                                                                   EXHIBIT 10.62

                                PROMISSORY NOTE

$5,700,000

                                                              New York, New York
                                                                   June 13, 2002

                  This Promissory Note (the "Note") is executed and delivered
pursuant to that certain Asset Purchase Agreement dated effective as of April
17, 2002 (as amended, the "Agreement") between ClearBlue Technologies
Management, Inc. and AppliedTheory Corporation and the subsidiaries of
AppliedTheory Corporation set forth on the signature page thereto and Schedule 1
thereto. Capitalized terms not otherwise defined herein shall have the meanings
ascribed thereto in the Agreement.

                  1.       PAYMENT. FOR VALUE RECEIVED, the undersigned,
ClearBlue Technologies Management, Inc., a Delaware corporation ("MAKER"),
promises to pay to the order of AppliedTheory Corporation, a Delaware
corporation, or its assigns or any subsequent holder(s) of this Note ("HOLDER"),
on the fourth anniversary of the date of this Note at such place as the Holder
may designate from time to time in writing to the Maker, in lawful money of the
United States of America, the principal sum of FIVE MILLION SEVEN HUNDRED
THOUSAND DOLLARS ($5,700,000), together with interest on the unpaid principal
balance of this Note from the date hereof until paid at eight percent (8%) per
annum; provided, however, that Maker shall have the right to reduce, dollar for
dollar, any outstanding principal balance under this Note by the amount of any
setoff or recoupment right arising prior to Closing exercised by any third party
under any Contracts with customers, but only to the extent that such setoff or
recoupment cannot be applied against the obligations of Maker under that certain
secured promissory note by Maker, for the benefit of Holder, in the principal
amount of $5,400,000, as further described in the amendment to the Agreement of
even date herewith entered into between Maker and Holder. Maker shall notify
Holder in writing of the exercise by a third party of any such setoff or
recoupment right within 10 days of Maker's actual knowledge thereof. Interest
shall be computed on the basis of the actual days elapsed over a 360-day year,
and shall be payable in cash on each anniversary date of the date of this Note.

                  The principal balance of this Note may be prepaid, at the
option of Maker, in whole at any time, or in part from time to time, without
premium or penalty.

                  All amounts received for payment under this Note shall, at the
option of Holder, be applied first to any unpaid expense of Holder under Section
5 hereof, then to unpaid interest due on overdue installments, then to unpaid
interest accrued, and finally to the reduction of the outstanding principal
balance of the Note.

                  2.       REPRESENTATIONS, WARRANTIES AND COVENANTS. While this
Note is outstanding, Maker hereby continuously represents, warrants and
covenants to Holder that:

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                  a.       Company Status. Maker is a corporation duly
organized, validly existing and in good standing under the laws of the State of
Delaware and duly qualified and in good standing in every other state or
jurisdiction in which the nature of Maker's business requires such qualification
except where failure to be so qualified would not individually or in the
aggregate have a material adverse effect on its business.

                  b.       Authority and Execution. Maker has full power,
authority and legal right to own its property and assets and to transact the
business in which it is engaged. Maker has the full power, authority and legal
right to execute and deliver, to perform its obligations and has taken all
necessary action to authorize the execution, delivery and performance of this
Note.

                  c.       Legal, Valid and Binding Character. This Note
constitutes the legal, valid and binding obligation of Maker and is enforceable
in accordance with its terms.

                  d.       No Violations. The execution, delivery and
performance of its obligations hereunder by Maker will not violate any
requirement of law applicable to Maker or any material contract, agreement or
instrument to which Maker is a party or by which Maker or its property is bound.

                  e.       Financial Information. Maker shall provide Holder as
soon as available, but in any event within ninety (90) days after the end of
each fiscal year, Maker's balance sheet as at the end of such fiscal year and
the related statements of income for the twelve months then ended, which shall
be prepared in accordance with U.S. generally accepted accounting principles
("GAAP").

                  f.       Net Worth. Maker covenants that its net worth as
determined consistent with GAAP shall be at least $15 million at all times
during which the Note or any portion thereof remains unpaid.

                  3.       DEFAULT; REMEDY. The occurrence of one or more on the
following events shall constitute an "Event of Default":

                  a.       A default shall be made in the payment of any
principal or interest under the Note when the same shall become due and payable
whether at maturity, by acceleration, or otherwise within 10 days of when same
shall become due and payable;

                  b.       The failure to perform under and/or committing any
other breach of this Note (and Maker covenants to provide written notice to
Holder of such breach that Holder would not otherwise have knowledge of); which
is not cured within thirty (30) days of the notice in writing to Maker by Holder
(or Holder by Maker) of the occurrence of such breach; or

                  c.       If Maker shall (i) apply for or consent to the
appointment of, or the taking of the possession by, a receiver, custodian,
trustee or liquidator of itself or of all or a substantial part of its property,
(ii) make a general assignment for the benefit of creditors, (iii) commence a
voluntary case under the federal bankruptcy laws (as now or hereafter in
effect), (iv) be

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adjudicated a bankrupt or insolvent, (v) file a petition seeking to take
advantage of any other law providing for the relief of debtors, (vi) acquiesce
to, or fail to have dismissed, within thirty (30) days, any petition filed
against it in any involuntary case under such bankruptcy laws, or (vii) take
any action for the purpose of effecting any of the foregoing.

                  d.       During the pendency of any uncured Event of Default,
unpaid principal amounts remaining unpaid hereunder and any interest installment
not paid when due remaining unpaid hereunder shall bear interest at a rate of
two percentage points (2%) in excess of the rate set forth in Section 1 hereof.

                  4.       ACCELERATION. If a payment Event of Default shall
occur and remain uncured within any applicable notice and cure period then this
Note shall immediately become due and payable, without notice. If any other
Event of Default shall occur hereunder which is not cured within any applicable
grace period, then this Note may be declared to be immediately due and payable,
together with attorneys' fees, if the collection hereof is placed in the hands
of an attorney to obtain or enforce payment hereof.

                  5.       EXPENSES OF COLLECTION BORNE BY MAKER. If this Note
is not paid in accordance with its terms, or should it become necessary in the
opinion of Holder to employ counsel to collect or enforce this Note, Maker shall
pay to Holder, to the extent permitted by applicable law, all reasonable costs,
charges, disbursements and attorney's fees incurred by Holder in collecting or
enforcing payment thereof or in protecting the same, whether incurred in or out
of court.

                  6.       WAIVER OF JURY TRIAL OTHER WAIVERS; GOVERNING LAW.
MAKER EXPRESSLY WAIVES ANY RIGHT TO TRIAL BY JURY OF ANY CLAIM, DEMAND, ACTION
OR CAUSE OF ACTION ARISING UNDER THIS NOTE AND HEREBY AGREES AND CONSENTS THAT
ANY SUCH CLAIM, DEMAND, ACTION OR CAUSE OF ACTION SHALL BE DECIDED BY COURT
TRIAL WITHOUT A JURY.

                  The delay or failure to exercise any right hereunder shall not
waive such right. Maker hereby waives demand, presentment, protest, notice of
dishonor or nonpayment, notice of protest, any and all delays or lack of
diligence in collection hereof and assents to each and every extension or
postponement of the time of payment or other indulgence.

                  Any legal suit, action or proceeding not directly subject to
the jurisdiction of the Bankruptcy Court and arising out of or relating to this
Note must be instituted in a federal court whose district encompasses any part
of New York City, State of New York, and the Maker and Holder hereby submit to
this jurisdiction.

                  This Note shall be governed by, and construed and interpreted
in accordance with, the laws of the State of New York.

                  7.       MODIFICATION; WAIVER. This Note may not be modified
nor shall any waiver hereunder be effective unless in writing and signed by the
party against whom the same is asserted.

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                  8.       ASSIGNMENT. This Note may be assigned by the Holder;
provided, however, that it shall not be held of record by more than three (3)
holders (counting as a single holder for such purpose any liquidating trust or
similar entity).

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                  IN WITNESS HEREOF, the undersigned has duly executed and
delivered this Note the date and year first above written.

                                            CLEARBLUE TECHNOLOGIES
                                              MANAGEMENT, INC.

                                            By: /s/ Mark Lambourne
                                                ----------------------------
                                                Name: MARK LAMBOURNE
                                                Title: PRESIDENT

STATE OF NEW YORK    )
                     ) ss.:
COUNTY OF ONONDAGA   )

         On the 5th day of June, 2002 before me personally came Mark Lambourne
to me known, who being by me duly sworn, did depose and say that he is the
President, of the corporation described in and which executed the foregoing
instrument; and that he/she signed his/her name thereto by order of said
corporation.

                            /s/ Patricia J. Foster
                            ----------------------------------------------------
                            Notary Public            PATRICIA J. FOSTER
                                              Notary Public, State of New York
                                             Qualified in Onon. Co. No. 4755760
                                            My Commission Expires Sept. 30, 2002

                 [Signature Page to $5,700,000 Promissory Note]

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