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                                                                   EXHIBIT 10.21

                       ADDENDUM TO EMPLOYMENT AGREEMENT

     This Addendum to the Employment Agreement (the "Addendum") is entered into
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this 29th day of June, 1999 by and between Pointshare Corporation, a Delaware
corporation (the "Company"), and Timothy L Kilgallon ("Kilgallon").
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     WHEREAS, the Company and Kilgallon are parties to that certain Employment
Agreement dated as of July 18, 1997 (the "Agreement").
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     WHEREAS, the Company and Kilgallon hereby desire to supplement certain
provisions of the Agreement relating to compensation to Kilgallon.

     NOW, THEREFORE, THE PARTIES AGREE AS FOLLOWS:

     1.  New Sections 3(g) and (h) shall be added to the Agreement reading as
follows:

         (g) Additional Grant. Kilgallon will be granted a non-qualified option
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to purchase an additional 700,000 shares of the Company's Common Stock under,

and pursuant to the terms of, the Company's 1996 Amended and Restated Stock
----------------------------
Option Plan, including without limitation Section 11 thereof, at an exercise
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price equal to the fair market value (as determined by the Company's Board of
Directors) on the date of grant (currently estimated to be $0.125 per share)
(the "Additional Shares"). Such Additional Shares will vest and become
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exercisable as follows, provided Kilgallon continues to provide services to the
Company:

                    (i) 200,000 shares will vest over a four-year period as
          follows: Twenty-five percent (25%) of the shares will vest on July 1,
          2000 and one-thirty-sixth (1/36th) of the remaining seventy-five
          percent (75%) of the shares will vest ratably at the end of each month
          thereafter upon Kilgallon's completion of each month of service with
          the Company.

                    (ii) 500,000 shares will vest as follows:

                         (A) 100,000 shares upon the earlier of (A) the closing
                         of a private equity financing with gross proceeds to
                         the Company of at least $20.0 million and (B) June 30,
                         2006;

                         (B) 200,000 shares upon the earlier of (A) the closing
                         of the Company's initial public offering of Common
                         Stock pursuant to a registration statement filed under
                         the Securities Act of 1933, as amended or upon a
                         "Change in Control" (as defined below) and (B) June 30,
                         2006; and

                         (C) 50,000 shares upon consummation of each agreement
                         with a corporate or strategic partner (as evidenced by
                         an equity investment or an agreement to collaborate
                         with respect to development, marketing or

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                         product offering) up to a maximum of 200,000 shares for
                         four such agreements; provided that in any event such
                         200,000 shares shall be deemed fully vested on June 30,
                         2006 if Kilgallon is still providing services to the
                         Company.

     "Change of Control" shall mean any acquisition of the Company, whether by
merger (except for a merger effected solely for the purposes of changing the
domicile of the Company) or any other transaction or series of related
transactions in which the shareholders of the Company immediately prior thereto
own less than a majority of the voting stock of the Company (or its successor or
parent) immediately thereafter.

     2.  Except as provided herein, the Agreement shall remain in full force and
effect. If one or more provisions of this Amendment are held to be unenforceable
under applicable law, such provision shall be excluded from this Amendment and
the balance of this Amendment shall be interpreted as if such provision were so
excluded and shall be enforceable in accordance with its terms.

     3.  Nothing in this Amendment, express or implied, is intended to confer
upon any party, other than the parties hereto, and their respective successors
and assigns, any rights, remedies, obligations or liabilities under or by reason
of this Amendment, except as expressly provided herein.

     4.  This Amendment shall be governed by and construed under the laws of the
State of Washington.

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

                            [Signature page follows]

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     IN WITNESS WHEREOF, the parties have executed this Addendum as of the date
first above written.

                            POINTSHARE CORPORATION:

                            By:   /s/ Craig T. Davenport
                                  ----------------------
                            Name: Craig T. Davenport
                                  ----------------------
                            Its:  Chairman
                                  ----------------------

                            Address:  1300 114th Avenue SE, Suite 100
                                      Bellevue, WA 98004

KILGALLON:

/s/ Timothy J. Kilgallon
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Timothy J. Kilgallon

Address:  4356 E. Mercer Way
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          Mercer Island, WA 98040
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