Document:

<PAGE>

                               SILICON IMAGE, INC.
                            EXECUTIVE BONUS PLAN FOR
                        JULY 1, 2000 TO DECEMBER 31, 2000

OBJECTIVE: Award executive staff members named below for achievement of revenue
growth and profitability.

SUMMARY: Named executive staff members will be eligible to receive a cash bonus
based on a percentage of their then current base salary.

Executives shall receive a bonus of X% of their base salary earned in the
six-month period ended December 31, 2000. The X% will be determined based on a
matrix of revenue and income from operations to be approved by the Board of
Directors.

The maximum payout will be equal to 65% of the base salary and the President
will receive an additional 50% of the calculated percentage (if VP payout will
be 20% the President payout will be 30%).

DISTRIBUTION: Bonus amounts will be paid as soon as reasonably possible
following public disclosure of the Company's Q4-2000 financial results.
Participants must be employed at the time of the distribution to be eligible for
the payment, unless otherwise determined by the Board of Directors.

This Executive Bonus Plan may be modified or cancelled, at any time and for any
reason, at the sole discretion and by a majority of the Board of Directors.
Eligibility for participation in the Executive Bonus Plan is not evidence nor
does it constitute a contract of employment between the Company and the Named
Executive.

This Executive Bonus Plan is not qualified under Section 401(a) of the Internal
Revenue Code of 1986, as amended, and is not subject to any provisions of the
Employee Retirement Income Security Act of 1974 ("ERISA").

NAMED EXECUTIVE STAFF MEMBERS ARE:

President and CEO - David Lee

Named Executives Reporting to the President: Dan Atler, Victor DaCosta, Parviz
Khodi, Jalil Shaikh, Steve Tirado, Doris Shin<PAGE>
                                                           EXHIBIT 10.5

                                  ZIPLINK, INC.
                              900 CHELMSFORD STREET
                               TOWER 1, 5TH FLOOR
                                LOWELL, MA 01851

July 26, 2000

Mr. Henry M. Zachs
ZipLink, Inc.
40 Woodland Street
Hartford, CT 06105

Dear Henry:

         We refer to the Revolving Loan and Security Agreement, dated July 26,
2000, between Fleet National Bank (the "Bank") and Ziplink, Inc. (the "Company")
respecting the terms of a Revolving Loan (the "Revolving Loan") to the Company,
to be guaranteed by you personally (the "Guaranty") and with the Guaranty
secured by your pledge to the Bank no less than 600,000 shares of Vodafone
Airtouch PLC common stock (the "Pledge").

         In consideration for your entering into the Guaranty and Pledge and
maintaining the Guaranty and Pledge during the term of the Revolving Loan, and
for the related agreements set forth in this letter, the Company agrees to pay
you the following compensation:

1.       Interest on amounts borrowed of 4%, with such payments made monthly in
         arrears at the same time that interest is due to the Bank.

2.       A structuring fee of $100,000.00, with such fee payable upon execution
         of the Revolving Loan and the Guaranty.

3.       A drawdown fee of 5% on each drawdown by the Company on the Revolving
         Loan, with such fees payable at the time of each draw.

         You acknowledge that (a) the Bank and the Company plan to enter into an
interest rate swap in connection with the Revolving Loan, and (b) from time to
time during the term of the Revolving Loan and the Guaranty the Company may
enter into capital leases to satisfy its equipment needs, including the
potential sale and leaseback of current equipment.. You agree to consent to each
such interest rate swap and additional line of credit, and to execute such
amendments to the Guaranty, consents or other documents reasonably requested by
the Company or the Bank to continue the Guaranty and Pledge in full force and
effect following any such transaction or transactions.
<PAGE>

         Please indicate your acceptance of these terms by executing a copy of
this letter and returning it to me.

                                Very truly yours,

                                ZIPLINK, INC.

                                By: /s/ Gary P. Strickland
                                    --------------------------------
                                Gary P. Strickland
                                Chief Financial Officer

ACCEPTED AND AGREED:

/s/ Henry M. Zachs
--------------------------
Henry M. Zachs

<PAGE>

                                  ZIPLINK, INC
                              900 CHELMSFORD STREET
                              TOWER 1, FIFTH FLOOR
                                LOWELL, MA 01851

July 26, 2000

Mr. Henry Zachs
ZipLink, Inc.
40 Woodland Street
Hartford, CT 06105

Dear Henry:

         Reference is made to that certain Letter Agreement, dated as of the
date hereof, between ZipLink, Inc. (the "Company") and you, regarding
compensation to be paid to you in connection with your personal guaranty of the
Company's Revolving Loan and Security Agreement, dated as of the date hereof, by
and between the Company and Fleet National Bank (the "Agreement"), secured by
your pledge of non-affiliated stock held by you personally.

         This letter is to confirm the Company's agreement with you that your
prior approval is required for (i) each Company draw down under the Agreement
and (ii) the grant by the Company of any additional collateral as security to
secure the Company's borrowings under the Agreement.

         If the foregoing correctly sets forth our understanding of the terms of
our agreement, please acknowledge your agreement by signing below.

                                                    Very truly yours,

                                                    ZIPLINK, INC.

                                                    By: /s/ Gary P. Strickland
                                                    ---------------------------
                                                    Gary P. Strickland
                                                    Chief Financial Officer

ACCEPTED AND AGREED:
/s/ Henry M. Zachs
--------------------------
Henry M. Zachs<PAGE>

Confidential Treatment has been requested for portions of this Exhibit. The
confidential portions have been redacted and are denoted by [*]. The
confidential portions have been filed separately with the Securities and
Exchange Commission.

                                                                   Exhibit 10.6

                                ZIPLINK-1ST UP
                         STRATEGIC ALLIANCE AGREEMENT

This document is an agreement between Ziplink, Inc. ("Ziplink"), with its
principal offices at Tower 1, 5th Floor, 900 Chelmsford Street, Lowell, MA
01851 and 1stUp.com Corporation ("1stUp"), with its principal offices at 930
Montgomery St., Suite 200, San Francisco, CA 94133.

WHEREAS Ziplink wishes to provide Internet connectivity to a preferred
advertisement supported Internet access service;

WHEREAS 1stUp wishes to obtain Internet connectivity through a preferred
Internet connectivity vendor.

NOW THEREFORE, in consideration of the mutually agreed upon terms and
conditions set forth herein, the parties' agreement and understanding is as
follows:

1.0     SERVICE

1.1 Ziplink shall provide end users accessing the Internet through 1stUp's
    advertisement supported Internet access service ("end users") with Internet
    dial-up connectivity on a nationwide basis on an as-needed, as-requested
    basis.

1.2 For each complete hour of dial-up connectivity used by end-users, 1stUp
    will pay to Ziplink [*]. Ziplink warrants that no other advertisement
    supported Internet access service shall receive a lower rate for dial-up
    connectivity from Ziplink than that afforded to 1stUp for similar volumes
    and terms.

1.3 Ziplink shall invoice 1stUp on a monthly basis for the hours of
    connectivity used by end users. Ziplink will make available to 1stUp
    detailed network usage statistics, including but not limited to usage
    information by dial in number and connection and disconnect rates.

1.4 The parties agree to negotiate in good faith a minimum commitment of hours
    of use by end users, per month, guaranteed by 1stUp on the Ziplink
    network. Such negotiation shall commence 90 days after the date on which
    Ziplink's services are first made available to end users (the "Service
    Availability Date"). If 120 days after the Service Availability Date the
    parties have not each executed a written agreement regarding a minimum
    commitment, this agreement shall immediately terminate. There shall be
    no minimum commitment of hours of use by end users until such time as the
    parties execute such a written agreement, and the minimum commitment shall
    run only from the date of execution of the written agreement forward.

2.0 SERVICE STANDARDS

2.1 Ziplink agrees that ten (10) days prior to the Service Availability Date,
    the connectivity service it affords to end users will meet the technical
    requirements outlined in Exhibit A: Ziplink Technical Requirements.

2.2 Ziplink agrees that forty-five (45) days prior to the Service Availability
    Date, it will provide to 1stUp a list of all dial-up numbers currently
    available on the Ziplink network.

2.3 Provided that 1stUp has provided usage forecasts to Ziplink at least 90
    days in advance, Ziplink shall maintain at least P.05 Grade of Service
    ("GOS") for each dial system. P.05 is defined as dial service call
    blocking (busies) and disconnects not initiated by end-users (disconnects),
    during any given hour of the dial system that will not exceed 5% (or 5 in
    100

<PAGE>

    attempts) as measured by Ziplink network management tools and, if
    available, Inverse Network Technology network management tools. Ziplink
    shall maintain records reflecting rates of dial service call blocking on
    an hour-by-hour basis, which records shall be made available to 1stUp
    upon request. If Ziplink fails to meet the GOS three (3) or more times,
    1stUp reserves the right to terminate this agreement upon ten (10) days
    written notice.

2.4 Ziplink may perform routine network maintenance during the hours of 2 a.m.
    and 4 a.m. Pacific Standard Time. Ziplink's service will be available
    99.5% or more of the remaining scheduled total minutes of up time each
    month ("Service Availability Requirement"). If Ziplink fails to meet the
    Service Availability Requirement two (2) or more times, 1stUp shall have
    the right to terminate this agreement upon ten (10) days written notice.

2.5 Ziplink will make available a Program Manager with a high degree of
    familiarity with the 1stUp's engineering requirements and specifications,
    as well as the Technical Requirements set forth in Exhibit A, for a weekly
    conference call with 1stUp representatives beginning within seven (7) days
    of the date Ziplink executes this agreement. Ziplink will provide to 1stUp
    24x7 support personnel familiar with Ziplink network and the 1stUp system.
    The Program Manager will be available 24x7 on an on call basis to the
    Ziplink support personnel.

3.0 JOINT PROMOTIONAL ACTIVITIES

3.1 During the term of this agreement Ziplink shall designate and refer to
    1stUp as its "Preferred Advertisement Supported Internet Access Service,"
    so long as the price of 1stUp's service remains equal to or better than
    competing advertisement supported Internet access services. However, this
    designation shall not prohibit nor prevent ZipLink from entering into
    strategic agreements with other advertisements supported Internet access
    services.

3.2 During the term of this agreement, 1stUp shall designate and refer to
    ZipLink as a "Preferred Provider of National Wholesale Internet
    Connectivity Services." However this designation shall not prohibit nor
    prevent 1stUp from enterting into strategic agreements with any other
    provider of Internet connectivity services.

3.3 ZipLink and 1stUp will participate in a jointly developed and jointly
    approved press release announcing the alliance between the two companies.

3.4 During the term of this agreement, ZipLink shall introduce 1stUp
    representatives to representatives of third party companies with whom
    ZipLink has or develops strategic relationships. ZipLink shall encourage
    these third party companies to enter into agreements with 1stUp under
    which 1stUp will provide its Internet Access Services.

4.0 TERM AND TERMINATION

    Unless terminated as set forth in this Paragraph or in Paragraphs 2.3 and
    2.4 above, this Agreement shall take effect as of July 26, 1999 and shall
    endure for a term of thirty-six (36) months until July 31, 2002. The
    Agreement may be terminated by either party at any time, for any reason
    or for no reason, upon ninety (90) days written notice to the other.

5.0 MISCELLANEOUS

5.1 This Agreement shall not be assigned by either party without the written
    consent of the other, which consent shall not be unreasonably withheld
    provided, however, that no such consent shall be necessary in the event of
    an assignment in connection with the sale or transfer of all or
    substantially all of the assets or business operations of either party.

5.3 Any and all disputes, claims or controversies related to or arising under
    this Agreement shall be settled by binding arbitration before one
    arbitrator under the then current rules of the American

<PAGE>

    Arbitration Association. The arbitration shall be held in Boston,
    Massachusetts if arbitration is requested by 1stUp and in San Francisco,
    CA if ZipLink requests arbitration. Any decision of the arbitrator shall be
    final and judgement upon the arbitration award may be entered in any court
    of competent jurisdiction.

5.4 This Agreement constitutes the sole agreement between 1stUp.com and
    Ziplink respecting the subject matter hereof and will duly supersede any
    and all other agreements, either oral or in writing. The Agreement shall
    only be modified or amended in writing, signed by both parties.

5.5 All notices required by this Agreement will be effective and deemed
    delivered three (3) business days after posting with the United States
    Postal Service when mailed by certified mail, return receipt requested,
    properly addressed and with the correct postage of one (1) business day
    after pick-up by the courier service when sent by overnight courier,
    properly addressed and prepaid.

             IF TO 1STUP                       IF TO ZIPLINK

             1stUp.com Corporation             ZipLink, Inc
             9300 Montgomery St. Suite 200     900 Chelmsford Street
             San Francisco, CA 94133           Tower 1, 5th Floor
             Attention: Jonah Steinhart        Lowell, MA 01851
                                               Attention: Ronald Lipof

    In Witness whereof, the parties have executed this Strategic Alliance
    Agreement on the dates noted below:

    AGREED AND ACCEPTED

   ZipLink, LLC                                 1stUp.com Corporation

    /s/  Ronald C. Lipof                         /s/ Charles Katz
   ---------------------------------            ------------------------------
   By:    Ronald C. Lipof                       By:    Charles Katz
   Title: Chief Strategic & Development Officer Title: President & CEO

   Date:     07-23-99                           Date:     07-23-99
        ----------------------------                 -------------------------

<PAGE>

                                          Exhibit A:

                             Ziplink Technical Requirements

RADIUS

All radius authentication requests should be proxied to 1stup.com Radius
servers. ZIPLINK should be able to support a round-room system to load
balanace and fallover between multiple 1stup.com Radius servers. ZIPLINK
Radius should detect 1stup.com Radius server failure within 30 seconds and
stop sending Radius requests to that server. It should check at least every
30 seconds to see if that server is back up and then continue to send
requests once the server is back up.

ZIPLINK Radius should send Radius authentication requests, Radius Accounting
start, and Radius accounting stop records. The Accounting records should
include (at least): Username, Framed IP Address, Modem Tx and Rx speed,
Disconnected reason, NAS Port, Called Number, Calling Number and a timestamp.

Radius should conform to the appropriate RFC's (2138 and 2139) and should
support using UDP ports 1645 and 1646.

User Disconnect

Ziplink should be able to support a user Disconnect program that accepts
input from a 1stup.com server process. This program should accept at least a
username and Framed IP Address (for verification) from 1stup.com, and should
disconnect the user. The communication between the ZIPLINK and 1stup.com
should be signed or encrypted in some way for authentication. MDS
authentication is acceptable.

The User Disconnect program should return success or failure on disconnect of
the user, and a standard Radius accounting stop record should be sent for
every user disconnected. The connection between 1stup.com and the ZIPLINK
should use TCP for reliability, and should preferably be a daemon on a port
and not a Command-line Interface.

<PAGE>

                     AMMENDMENT 1 TO STRATEGIC ALLIANCE AGREEMENT

     This AMENDMENT is made as of August, 1999 (the "Effective Date") by
and between Ziplink Inc. ("Ziplink"), with its principal offices at Tower
1, 5th Floor, 900 Chelmsford Street, Lowell, MA 01851 and 1stUp.com Corporation
("1stUp"), with its principal offices at 930 Montgomery St., Suite 200, San
Francisco, CA 94133 for the purposes of modifying the Strategic Alliance
Agreement between the parties, dated as of July 1999 ("Agreement").

WHEREAS, the parties have entered into the Agreement so that Ziplink shall
provide internet connectivity to a preferred advertisment supported internet
access service and 1stUp shall obtain internet connectivity through a
prefferd internet connectivity vendor.

WHEREAS, the parties wish to amend the Agreement to discount the first two
months of payments from 1stUp to Ziplink, provided 1stUp meets certain
conditions regarding integration of the Ziplink access numbers.

Now, therefore, The parties agree as follows:

1. Except as amended by this Amendment, the terms and conditions of the
   Agreement shall remain in full force and effect.

2  1stUp agrees to devote special engineering resources sufficient to
   immediately integrate into its ad-supported internet access application
   functioning access numbers provided by Ziplink.  1stUp further agrees that
   no later than August 12, 1999 it shall make these numbers available to
   endorsers accessing the ad-supported internet access offering provided by
   1stUp.com and its affiliate partners, including Alta Vista Company.

3  For the two successive 30 day billing periods, beginning on August 12,
   1999 and ending on October 12, 1999. Ziplink agrees to discount its total
   monthly bill to 1stUp, as defined by the pricing items outlined in Section
   1.2 of the Agreement by twenty-five (25) percent.

4  Ziplink further agrees that it will complete development and integration
   of the technical specifications described in the Agreement under Exhibit A:
   Ziplink Technical Requirements no later than August 30, 1999. Ziplink
   agrees that for every week after August 30, that Ziplink fails to deliver
   the complete Technical Requirements, 1stUp shall be awarded an additional
   month of discounted access, discounted by twenty-five (25) percent according
   to the terms of Section 3 of this Amendment 1stUp understands that
   development and integration delays on the part of 1stUp will extend the
   delivery deadline by a period of time equivalent to any such delay(s).

In Witness whereof, the parties have executed this Amendment on the dates
noted below:

AGREED AND ACCEPTED

Ziplink, LLC                                  1stUp.com Corporation

  /s/ Chris Jenkins                             /s/ Jonah Steinhart
-------------------------------               ------------------------------
By:       Chris Jenkins                       By:    Jonah Steinhart
Title:    President                           Title: Vice President, Marketing

<PAGE>

                  AMENDMENT 2 TO STRATEGIC ALLIANCE AGREEMENT

This AMENDMENT is made as of December 13, 1999 between Ziplink, Inc.
("Ziplink") with its principal offices at Tower 1, 5th Floor, 900 Chelmsford
Street, Lowell, MA 01851 and 1stUp.com Corporation ("1stUp"), with it
principal offices at 88 Kearny Street, Suite 800, San Francisco, CA 94108 for
the purpose of modifying the Strategic Alliance Agreement between the
parties, dated as of July 1999 ("Agreement")

WHEREAS, the parties have entered into the Agreement so that Ziplink shall
provide Internet connectivity to 1stUp.

WHEREAS, the parties wish to amend the Agreement to revise pricing and
committment levels.

NOW THEREFORE the parties agree as follows:

  1.  Except as amended by this Amendment, the terms and conditions of the
      Agreement shall remain in full force and effect.

  2.  Pursuant to Section 1.4 of the Agreement the parties hereby agree that
      during the term of the Agreement there shall be no minimum commitment
      of hours of use by end users (as defined in the Agreement) guaranteed
      by 1stUp on the Ziplink network. The parties further ackowledge and
      agree that this Section 2 constitutes the written agreement between
      Ziplink and 1stUp required under Section 1.4 of the Agreement and that
      all conditions under Section 1.4 of the Agreement have been satisfied.

  3.  The Agreement shall be amended by adding an Exhibit B thereto  which
      sets forth fee schedule attached hereto as "Exhibit B--Fee Schedule."

  4.  Section 1.2 of the Agreement is hereby deleted in its entirety and
      replaced with the following:

          1.2   Subject to the terms and conditions set forth herein, 1stUp
                shall pay Ziplink a monthly fee ("Usage Fee") which shall
                be payable in accordance with the invoice delivered by
                Ziplink to 1stUp pursuant to Section 1.3 hereof. The Usage Fee
                shall be calculated by multiplying the total number of hours
                of usage during a given month by the end users (as defined in
                Section 1.1) on the Ziplink Network as counted by the Ziplink
                authentication server over the course of the month by the
                applicable dollar amount per hour (the "Hourly Fee") set
                forth in Exhibit B attached hereto. Ziplink warrants that no
                other advertising supported Internet access service shall
                receive a lower rate for dial-up connectivity from Ziplink
                than that afforded to 1stUp for similar volumes and terms.

  5.  The Agreement shall be amended by adding a new section 5.6 thereto
      which shall read in its entirety as follows:

          5.6   1stUp agrees that it shall make commercially reasonable
                efforts to provide Ziplink with at least 120 days prior
                written notice in the event that 1stUp decides to decrease
                the number of hours of use by end users (as defined in
                Section 1.3) on the Ziplink network by more than 50%;
                provided, however, that no such prior written notice shall be
                required in the event that 1stUp makes such determination
                within 120 days of July 31, 2002. 1stUp agrees not to remove
                in each month, during such notice period, more than one quarter
                of the estimated decrease at the time such notice is given.
                The foregoing provisions of this Section 5.6 shall not apply
                in the event (i) this Agreement is terminated by 1stUp for
                cause or pursuant to Sections 2.3, 2.4, or 4.0, (ii) this
                Agreement is terminated by Ziplink pursuant to Section 4.0,
                or (iii) Ziplink fails to maintain at least P.05 Grade of
                Service as defined in Section 2.3 of the Agreement.

<PAGE>

IN WITNESS WHEREOF, the parties have executed and delivered this Amendment to
the Agreement on the date set forth below:

AGREED AND ACCEPTED

1stUp.com Corporation                            Ziplink, Inc.

/s/ Charltes Katz                                /s/ Ronald C. Lipof
----------------------------------               ----------------------------
By:     Charles Katz                             By: Ronald C. Lipof
Title:  CEO                                      Title: CSO
Date:   12/13, 1999                              Date:  12/13, 1999

<PAGE>

                               EXHIBIT B - FEE SCHEDULE

Subject to the conditions contained in the Agreement. 1stUp shall pay the
Hourly Fee set forth below multiplied by the aggregate number of Monthly
Hours.

                     Monthly Hours                Hourly Fee
                     -------------                -----------

         0-749,999                                   [*]

         750,000-999,999                             [*]

         1,000,000-1,499,999                         [*]

         1,500,000-1,999,999                         [*]

         -greater than or equal to- 2,000,000        [*]

<PAGE>

                 THIRD AMENDMENT TO STRATEGIC ALLIANCE AGREEMENT

This third amendment ("Amendment") with an effective date of July 1, 2000
("Effective Date") amends the Strategic Alliance Agreement between Ziplink,
Inc., ("Ziplink") and 1stUp.Com Corporation ("1stUp"), dated July 23, 1999, and
all amendments and addenda thereto ("Agreement"). All terms and conditions of
the Agreement not expressly modified herein shall remain in full force and
effect. Unless otherwise provided in this Agreement, capitalized terms contained
herein shall carry the same definitions as specified in the Agreement.

For good and valuable consideration, the receipt and legal sufficiency of which
are hereby acknowledged, the Parties hereby agree to amend the Agreement as
follows:

<TABLE>
<CAPTION>

1.       DELETE EXHIBIT B OF THE AGREEMENT AND REPLACE WITH THE FOLLOWING:

                                                   EXHIBIT B - FEE SCHEDULE
<S>                                                 <C>                                 <C>
------------------------------------- ----------------------------------- -----------------------------------

          Cumulative Hours                Applicable Hourly Fee for        Applicable Hourly Fee for Basic
  Of Usage by End Users in United      United States and Select Canada*             Canada* ($USD)
         States and Canada
------------------------------------- ----------------------------------- -----------------------------------
0 - 749,999                                         [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
750,000 -999,999                                    [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
1,000,000 - 1,499,999                               [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
1,500,000 - 1,999,999                               [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
2,000,000 - 2,499,999                               [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
2,500,000-3,999,999                                 [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
4,000,00-5,999,999                                  [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
6,000,00-8,999,999                                  [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
9,000,000 and up                                    [*]                                   [*]
------------------------------------- ----------------------------------- -----------------------------------
</TABLE>

* "Select Canada" refers to Montreal, PQ, Toronto, ON, and Vancouver, BC usage.
"Basic Canada" refers to all other Canadian cities.

The applicable Hourly Fees shall be determined by the cumulative monthly
usage hours in the United States and Canada and shall apply to the entire set
of applicable usage hours. For example, if in a certain month, 1,800,000
hours are achieved in the United States and Select Canada and 400,000 hours
are achieved in Basic Canada, the applicable Hourly Fees are those fees set
forth above in the 2,000,000 - 2,499,999 pricing tier (2,200,000 cumulative
hours). In this example, the Hourly Fee of [*] shall apply to all 1,800,000
hours achieved for United States and Select Canada and the Hourly Fee of [*]
will apply for all 400,000 hours achieved for Basic Canada (aggregate [*]
Usage Fee).

<PAGE>

2. ADD A NEW SECTION 1.5 TO THE AGREEMENT THAT READS AS FOLLOWS:

   "1.5 1stUp.com shall provide to Ziplink, on a monthly basis, a non-binding
    three-month rolling forecast of Network usage."

IN WITNESS WHEREOF duly authorized representatives of the parties have executed
this Amendment.

ZIPLINK, INC.                               1STUP.COM CORPORATION

By:  /s/  Mark A.  Manual                   By:  /s/ Charles Katz
    ----------------------------                ----------------------------
Name:  Mark A. Manual                       Name:  Charles Katz
      --------------------------                  --------------------------
Title:  VP Sales                            Title:   CEO
       ---------------------------                 ---------------------------

<PAGE>

                FOURTH AMENDMENT TO STRATEGIC ALLIANCE AGREEMENT

This fourth amendment ("Amendment") with an effective date of JULY 25, 2000 ,
2000 ("Effective Date") amends the Strategic Alliance Agreement between Ziplink,
Inc., ("Ziplink") and 1stUp.Com Corporation ("1stUp"), dated July 23, 1999, and
all amendments and addenda thereto ("Agreement"). All terms and conditions of
the Agreement not expressly modified herein shall remain in full force and
effect. Unless otherwise provided in this Agreement, capitalized terms contained
herein shall carry the same definitions as specified in the Agreement.

For good and valuable consideration, the receipt and legal sufficiency of which
are hereby acknowledged, the Parties hereby agree to amend the Agreement as
follows:

1.       DELETE EXHIBIT B OF THE AGREEMENT AND REPLACE WITH THE FOLLOWING:

<TABLE>
<CAPTION>

                                                  EXHIBIT B - FEE SCHEDULE

------------------------------------- ----------------------------------- -----------------------------------
          CUMULATIVE HOURS             APPLICABLE HOURLY FEE FOR UNITED    APPLICABLE HOURLY FEE FOR BASIC
  OF USAGE BY END USERS IN UNITED         STATES AND SELECT CANADA*                 CANADA* (USD)
         STATES AND CANADA
<S>                                                 <C>                                <C>
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
0 - 749,999                                         [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
750,000 - 999,999                                   [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
1,000,000 - 1,499,999                               [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
1,500,000 - 1,999,999                               [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
2,000,000 - 2,499,999                               [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
2,500,000 - 2,999,999                               [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
3,000,000 - 4,999,999                               [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
5,000,000 - 6,999,999                               [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
------------------------------------- ----------------------------------- -----------------------------------
7,000,000 and up                                    [*]                                [*]
------------------------------------- ----------------------------------- -----------------------------------
</TABLE>

     * "Select Canada" refers to Montreal, PQ, Toronto, ON, and Vancouver, BC
     usage. "Basic Canada" refers to all other Canadian cities.

     The applicable Hourly Fees shall be determined by the cumulative monthly
     usage hours in the United States and Canada and shall apply to the entire
     set of applicable usage hours. For example, if in a certain month,
     1,800,000 hours are achieved in the United States and Select Canada and
     400,000 hours are achieved in Basic Canada, the applicable Hourly Fees are
     those fees set forth above in the 2,000,000 - 2,499,999 pricing tier
     (2,200,000 cumulative hours). In this example, the Hourly Fee of [*] shall
     apply to all 1,800,000 hours achieved for United States and Select Canada
     and the Hourly Fee of [*] will apply for all 400,000 hours achieved for
     Basic Canada (aggregate [*] Usage Fee).

IN WITNESS WHEREOF duly authorized representatives of the parties have executed
this Amendment.

ZIPLINK, INC.                               1STUP.COM CORPORATION

By: /s/ Randy A. Lowenberg                By: /s/ Charles Katz
    ----------------------------              ----------------------------

Name: Randy A. Lowenberg                  Name: Charles Katz
      --------------------------                --------------------------

Title: Sales Director                     Title: President/CEO

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00013-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00013-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00013-of-00352.parquet"}]]