Document:

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                                                                   EXHIBIT 10.34

                                                           [i3 MOBILE LOGO]

March 30, 2000

Mr. Eric Aledort
Vice President Corporate Business Development
GO.com
610 Circle Seven
Glendale, CA  91201

Re:  i3 Mobile, Inc. - Letter of Intent

Dear Eric:

This letter sets forth a proposal to pursue further negotiations and discussions
leading to a definitive agreement between GO.Com ("GO.Com") and i3 Mobile, Inc.
("i3 Mobile"). The proposed arrangement will require further documentation and
approvals, including the preparation and approval of a definitive agreement
setting forth the terms and conditions of the business relationship (the
"Agreement"). Nevertheless, i3 Mobile and GO.com, by signing below, execute this
letter to evidence their intentions to proceed in mutual good faith to complete
the work required to negotiate the Agreement on terms that are consistent with
this letter.

In our view, i3 Mobile is uniquely positioned to work with GO.com to develop the
value of GO.com wireless information and product offerings. The proposed terms
and conditions include, but are not limited to, the following:

1.   LICENSE GRANT: During the term of the Agreement, i3 Mobile will provide
     Short Messaging Service ("SMS") integration services, including content
     delivery, wireless advertising and M-commerce transactions, to GO.com's
     affiliated web sites that consist of, for purposes of the Agreement,
     ESPN.COM, GO.COM, and ABCNEWS.COM ("GO Network Partners"). GO.com will not
     use any other third party to provide SMS integration services for delivery
     of content, wireless advertising or wireless e-commerce transactions for
     any of its GO Network Partners nor to AT&T, SBC Communications, or AirTouch
     Vodafone. i3 Mobile will be authorized to extend the ESPN and ABC NEWS
     brand names and logos to existing and/or future business partners of either
     ESPN, ABC NEWS or i3 Mobile. Additionally, i3 Mobile shall have the right
     of first negotiation for all other wireless platforms, other than WAP, to
     be used by GO.com and the GO Network Partners.

2.   TERM: The term of the Agreement shall be two (2) years beginning on the
     Effective Date and will automatically renew for a third year unless GO.com
     provides i3 Mobile with written notice of its intention to not renew the
     Agreement at least 90 days prior to the second anniversary of the Effective
     Date. The Effective Date of the Agreement shall be either (a) the date the
     Agreement is fully signed by the parties; or (b) the date of the first
     wireless service launch contemplated hereunder, whichever is later provided
     that any delay is not caused by i3. The parties agree to translate the
     terms of this letter into the Agreement within 30 days of the signing of
     this letter.

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3.   GEOGRAPHIC SCOPE: This agreement shall cover all U.S territory covered by
     Go.com and the GO Network Partners and other mutually agreed upon
     territories.

4.   DEVELOPMENT FEE: Immediately upon execution of the Agreement, i3 Mobile
     shall work with GO.com and the GO Network Partners to develop
     specifications to enable the GO Network Partners to deliver customizable
     content, data and transactional services to their customers wireless
     devices. GO.com shall pay i3 Mobile the base sum of $150,000 for the
     development of these three (3) web sites. The $150,000 payment shall
     include the following services:

     -    Technical design, development, testing and implementation of the
          wireless portal (including all provisioning pages).

     -    i3 Mobile Wireless Customer Care and on-line provisioning Set-Up

     -    In-house training of staff relating to customer service procedures and
          policies

     -    FAQ (Frequently Asked Questions) online document

     -    Second level customer support including access to i3 Mobile staff on a
          24/7 basis.

     Costs for additional development services for these web sites or
     development of additional affiliated GO.com web sites will be mutually
     agreed upon by the parties at such time.

5.   PAYMENTS BY i3: In consideration of the rights granted by GO.com to i3
     Mobile in Paragraph 1, i3 Mobile agrees to pay GO.com as follows: $350,000
     upon the Effective Date and an additional $400,000 on the first anniversary
     of the Effective Date of this Agreement. Unless terminated pursuant to
     paragraph 2, above, i3 Mobile agrees to pay GO.com $450,000 on the third
     anniversary of the Effective Date of this Agreement.

6.   WARRANTS: In consideration of the rights granted by GO.com to i3 Mobile in
     Paragraph 1, i3 Mobile shall issue to GO.com warrants (the "Warrant") to
     purchase up to 40,000 shares of i3's Common Stock at an exercise price
     equal to fifteen ($15.00) dollars per share. The Warrant shall vest (a) 13,
     333 upon the launch of the first wireless GO Network Partner web site (b)
     13,333 upon the first anniversary of the Effective Date and, if no notice
     of termination has been given per Paragraph 1, (c) 13,334 upon the second
     anniversary of the Effective Date, and shall expire three (3) years
     following issuance and shall not terminate upon an initial public offering
     or change of control of the Company. Subject to any relevant securities
     laws, rules and regulations, the Warrant, as well as the Common Stock
     acquired through exercise thereof, will be freely transferable by GO.com
     and may be exercised in whole or in part. When exercising the Warrant,
     GO.com shall have the right to either (a) purchase the total number of
     shares of Common Stock which such Warrant entitles GO.com to purchase at
     the exercise price described above or (b) receive the net number of shares
     of Common Stock arising from the difference between the market price of
     such Common Stock at the date of exercise and the exercise price of the
     Warrant. Prior to the grant of the Warrant hereunder, i3 will provide
     GO.com with an opportunity to review i3's standard Warrant form prior to
     execution.

7.   MARKETING FUNDS: i3 Mobile shall contribute $75,000 during the first six
     (6) months of this Agreement. These funds will be used to purchase
     advertising on the ESPN and/or ABCNEWS.com web sites at mutually agreed
     upon CPMs in order to promote participation and increase awareness of the
     wireless portal products in accordance with a marketing plan and the funds
     will be released in accordance with this plan.

8.   MONTHLY DATABASE/PROFILE MANAGEMENT FEE: Starting with the Effective Date
     of the Agreement, i3 Mobile shall charge a monthly fee based on the total
     number of users of the GO Network Partners according to the schedule
     outlined below. These charges are to cover i3 Mobile's costs of database
     infrastructure and maintenance, communication, file management, etc.:

          < 10,000 subscribers        -        $4000 per month
           10k - 25k subscribers      -        $0.30 per subscriber per month

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           25k - 50k subscribers      -        $0.25 per subscriber per month
            50k  + subscribers        -        $0.15 per subscriber per month.

9.   CONTENT LICENSING: During the term of the Agreement, i3 Mobile shall have
     the right to distribute content belonging to the GO Network Partners to
     create additional wireless products which may be branded with a GO brand or
     privately labeled by a wireless network operator and, in each instance,
     will be approved by GO.com in advance (including the financial terms of
     such distribution). It is also agreed that i3 Mobile will pay GO.com a fee
     for the licensing of GO.com content. These fees shall be mutually agreed
     upon by the parties in each instance.

10.  ADVERTISING/E-COMMERCE REVENUE: GO.com and i3 Mobile will share equally any
     advertising revenues (net of any third party advertising sales commissions,
     if any) and profit derived from mobile e-commerce transactions on the GO
     Network Partners sites (less any third party revenue sharing). GO.com and
     i3 will mutually agree upon the level of services to be provided.

11.  SUBSCRIPTION SERVICES: GO.com and i3 Mobile shall equally share all
     subscription revenues, net of management fees paid to i3 Mobile pursuant to
     paragraph 8. The parties shall mutually agree upon the retail cost of all
     subscription services.

12.  GO.COM OBLIGATIONS: Go.com will use its best commercially reasonable
     efforts to promote and advertise the wireless portal services, i.e. Fantasy
     League, ESPN.com, ABCNEWS.com, and Go.com etc. to encourage subscription
     growth through various media sources. Each GO Network Partner that offers
     wireless services will promote their wireless services on the home page of
     each site and shall hot link to a portal page offering all wireless
     services including the SMS Services.

13.  GO.COM RIGHT OF FIRST REFUSAL: i3 Mobile will grant to GO.com the right of
     first refusal to provide content to any distribution arrangement entered
     into by i3 Mobile with a North American wireless network operator any time
     during the Term of this Agreement. In the event that i3 Mobile reasonably
     believes that it will need to provide content to a carrier that is subject
     to this provision and is under no pre-existing contractual obligation,
     entered into prior to the date of this letter, to the contrary, i3 Mobile
     shall provide GO.com with a right to present an offer ("Offer") to i3
     Mobile to provide content necessary for such service prior to i3 Mobile's
     search for any other content provider. The written notice to exercise the
     right to present an Offer must be received by i3 Mobile within five (5)
     business days of GO.com's receipt of the initial notice hereunder. In the
     event the parties do not reach agreement as of the end of such period, the
     Company shall be permitted to enter into an agreement with another content
     provider.

14.  i3 MOBILE RIGHT OF FIRST REFUSAL: GO.com will grant to i3 Mobile the right
     of first refusal to provide GO.com and the GO Network Partners enhanced SMS
     Services (such as text to voice) for any of the wireless sites enabled
     hereunder.

This transaction is subject to the negotiation and execution of the Agreement
with terms satisfactory to i3 and GO.com. No press release or other announcement
concerning the proposed transaction will be issued except by the mutual written
consent of the parties and except as may be required by applicable securities
laws in connection with i3 Mobile's initial public offering. This letter and all
negotiations and discussions between the parties shall be strictly confidential
and will not be disclosed in any manner except to employees and agents of the
parties on a need to know basis.

Each of the parties will use its best efforts to complete and execute the
Agreement on or before April 15, 2000. This letter sets forth the intent of the
parties only, is not binding on the parties and may not be relied on as the
basis for a contract or be the basis for a claim based on detrimental reliance
or any other theory; provided that the confidentiality provisions are
enforceable in accordance with their terms. The parties understand that no party
shall be bound until the Agreement has been negotiated, executed and delivered.

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This letter may be terminated at any time by either party giving written notice
to the other. This letter will terminate automatically on April 15, 2000 if the
Agreement has not been executed by that date. If this letter accurately reflects
your understanding of our agreement, then kindly countersign and return the
enclosed copy of this letter to my attention.

Sincerely,

i3 Mobile, Inc.

/s/ Kevin D. Rockoff
--------------------
National Account Manager

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                             ACCEPTED AND AGREED TO:

                             GO.com, INC.

                             By: /s/  Lawrence J. Shapiro
                                -------------------------
                                 Executive Vice President

<PAGE>   6

Exhibit I

                           (see attached Spreadsheets)<PAGE>   1
                                                                     Exhibit 4.1

    [Form of common stock certificate of Cabot Microelectronics Corporation]

                         [CABOT MICROELECTRONICS LOGO]

              Incorporated Under the Laws of the State of Delaware

                                  COMMON STOCK

             NUMBER                                                SHARES

THIS CERTIFICATE IS TRANSFERABLE                               SEE REVERSE FOR
 IN BOSTON, MA OR NEW YORK, NY                               CERTAIN DEFINITIONS

                                                               CUSIP 12709P 10 3
   THIS CERTIFIES THAT
     is the owner of

    FULLY PAID AND NONASSESSABLE SHARES OF COMMON STOCK, $.001 PAR VALUE, OF
                       CABOT MICROELECTRONICS CORPORATION

transferable in person or by duly authorized attorney upon surrender of this
Certificate properly endorsed. The shares represented hereby are issued and
held subject to the laws of the State of Delaware and to the provisions of the
Certificate of Incorporation and the By-Laws of the Corporation as now or
hereafter amended to which the holder of this Certificate asserts by its
acceptance.
     This Certificate is not valid until countersigned by the Transfer Agent
and registered by the Registrar.
     Witness the facsimile seal of the Corporation and the facsimile signatures
of its duly authorized officers.

Dated:

/s/ William C. McCarthy    Cabot Microelectronics            /s/ Matthew Neville
VICE PRESIDENT AND               Corporation                       PRESIDENT AND
CHIEF FINANCIAL OFFICER         Corporate Seal           CHIEF EXECUTIVE OFFICER
                                     1999
                                   Delaware

                          Countersigned and Registered
                         EquiServe Trust Company, N.A.
                          Transfer Agent and Registrar
                                 by [signature]
                              Authorized Signature
<PAGE>   2
                CABOT MICROELECTRONICS CORPORATION

     The corporation will furnish without charge to each stockholder who so
requests the powers, designations, preferences and relative, participating,
optional or other special rights of each class of stock or series thereof and
the qualifications, limitations or restrictions of such preferences and/or
rights.

     The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<CAPTION>
     <S>       <C>                                <C>
     TEN COM   -as tenants in common              UNIF GIFT MIN ACT-         Custodian
     TEN ENT   -as tenants by the entireties                       ---------          --------
     JT TEN    -as joint tenants with right of                       (Cust)            (Minor)
                survivorship and not as tenants                     under Uniform Gifts to Minors
                in common                                           Act
                                                                       -----------------------
                                                                               (State)
                                                   UNIP TRF MIN ACT-          Custodian (until age        )
                                                                     ---------                    --------
                                                                      (Cust)                       (Minor)
                                                                                under Uniform Transfers
                                                                     ----------
                                                                       (Minor)
                                                                     to Minors Act
                                                                                  -----------
                                                                                    (State)
</TABLE>

        Additional abbreviations may also be used though not in the above list.

FOR VALUE RECEIVED,                 HEREBY SELL, ASSIGN AND TRANSFER UNTO
                   -----------------
PLEASE INSERT SOCIAL SECURITY OR OTHER
    IDENTIFYING NUMBER OF ASSIGNEE
----------------------------------
[                                 ]
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
  (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

                                                                          SHARES
--------------------------------------------------------------------------
OF THE CAPITAL STOCK REPRESENTED BY THE WITHIN CERTIFICATE, AND DO HEREBY
IRREVOCABLY CONSTITUTE AND APPOINT

                                                                        ATTORNEY
------------------------------------------------------------------------
TO TRANSFER THE SAID STOCK ON THE BOOKS OF THE WITHIN-NAMED CORPORATION
WITH FULL POWER OF SUBSTITUTION IN THE PREMISES.

DATED
     ------------------

                  X
                   ------------------------------------------------------------
           NOTICE: THE SIGNATURE TO THE ASSIGNMENT MUST CORRESPOND WITH THE
                   NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY
                   PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE
                   WHATEVER.

  Signature(s) Guaranteed:
                          --------------------------------------------------
                          THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE
                          GUARANTOR INSTITUTION (BANK, STOCKS/OPTIONS, SAVINGS
                          AND LOAN ASSOCIATION AND CREDIT UNIONS WITH MEMBERSHIP
                          IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM),
                          PURSUANT TO S.E.C. RULE 17AD-15.

This certificate also evidences and entitles the holder hereof to certain
rights as set forth in a Rights Agreement between Cabot Microelectronics
Corporation and BankBoston, N.A., dated as of March 24, 2000 (the "Rights
Agreement"), the terms of which are hereby incorporated herein by reference and
a copy of which is on file at the principal executive offices of Cabot
Microelectronics Corporation. Under certain circumstances, as set forth in the
Rights Agreement, such Rights will be evidenced by separate certificates and
will no longer be evidenced by this certificate. Cabot Microelectronics
Corporation will mail to the holder of the certificate a copy of the Rights
Agreement without charge after receipt of a written request therefor. Under
certain circumstances set forth in the Rights Agreement, Rights issued to, or
held by, any Person who is, was or becomes an Acquiring Person or an Affiliate
or Associate thereof (as defined in the Rights Agreement) and certain related
persons, whether currently held by or on behalf of such Person or by any
subsequent holder, may become null and void.

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