Document:

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                                                                 Exhibit 10.7

September 25, 1997

VIA FACSIMILE (***) ***-****

Mr. John Couch
******
******

Dear John:

Per our conversation and agreement, the following is the official offer which
has been authorized by the Board of Directors of Pangea to you to join Pangea as
Chief Executive Officer and a Member of the Board of Directors effective
immediately. As we agreed, this follows the memo that I gave you on September
11, 1997.

1.  FINANCIAL PACKAGE:

Your base salary will be $240,000 per year and a bonus plan will be established
that will enable you to earn up to 25% of the base for performance tied to key
'98 goals. These goals will be developed in concert with the Compensation
Committee of Pangea.

Regarding equity, Pangea agrees to grant at the next meeting of the Board of
Directors an incentive stock option for 800,000 shares of common stock which
shall vest over four years in accordance with Pangea's standard option
agreement. We agreed that vesting will begin on the date that you started
consulting at Pangea (May 1997). (This amount does include the previous option
that was granted to you as a consultant.)

In the event of 1) Pangea's sale of substantially all of its assets or 2) the
merger of Pangea with or into another corporation such that the holders of the
outstanding voting equity securities of Pangea immediately prior to such a
transaction hold fewer than 50% of the voting equities of the surviving entity
immediately following such a transaction, 50% of your uninvested options shall
become fully vested and exercisable.

You will be eligible to participate in the employee benefit plans that are
offered to all other executives of Pangea.

You will be reimbursed for business expenses in accordance with Pangea's
established expense policies. In addition, we agreed that we would be open to
considering reimbursing you for reasonable costs that are incurred in order to
reduce the hardship of travel from your home in Saratoga to Pangea headquarters.

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2.  FINANCING:

The investors have agreed to exercise their warrants, which call for an
additional investment of $2.5 million. This exercise will earn the investors a
1.5:1 common stock grant. The investors are very open to investing additional
capital per our original discussion, but want presentations of an updated plan
and strategy.

3.  OPTION POOL:

The Board has agreed to increase the current employee option pool by 2.0 million
shares.

4.  BOARD OF DIRECTORS:

We will initially remain a 7 person Board and Dale Pfost has agreed to leave the
Board in order for you to recruit a senior software operating executive. Dale

has also agreed to resign as the Chairman of Pangea.

5.  LOCATION:

The Founders and the Board are open-minded regarding a location more centrally
situated for recruiting. Obviously, you will need to analyze the situation and
determine what is best for the company.

6.  TIMING:

We will consider this offer to be effective on September 12, 1997, which was the
date of the Pangea off-site meeting and the date at which you acknowledged your
agreement to before the CEO of Pangea.

John, I know you are aware the Board and the Founders are looking forward to
working with you. We are all convinced that you are the guy to turn Pangea into
a major commercial success and the leader in its field.

Sincerely,                             AGREED AND ACCEPTED

/s/ Samuel D. Colella                  /s/ JOHN D. COUCH
                                       --------------------------------
Samuel D. Colella                       Date: 10/3/97
                                              ----------------------------<PAGE>

                                                                    Exhibit 10.8

July 16, 1999

Mr. Robert F. Williamson
******
******

Dear Rob:

Pangea Systems, Inc. is pleased to extend to you an offer of employment to join
our company in the capacity of Senior Vice President, Marketing, Business
Development and Ecommerce, effective July 19, 1999. You will report to John
Couch, President and CEO.

Attached, as Exhibit A, is a summary of the terms and conditions of this offer
of employment. It contains specific information concerning your title, duties,
salary, benefits and start date. Your initial compensation will consist of a
base salary payable as indicated on the attached exhibit. Future salary
adjustments and eligibility for participation in any company bonus program will
be in accordance with the company policy and will be based upon individual and
company performance.

You will be eligible to participate in the customary benefits offered to other
full-time employees in similar positions. These benefits include paid time off,
holiday time and a choice of group health and dental insurance plans as
summarized in Exhibit A.

This employment offer is contingent upon:

-        Your execution and return of all employment documents, including the
         attached Pangea Systems Employee Invention Assignment and
         Confidentiality Agreement.

         This agreement specifies, among other things, all intellectual property
         relating to your employment with Pangea will be owned by Pangea, that
         during any period while you are employed with Pangea, you will not work
         for, or in collaboration with, any competitors or potential competitors
         of Pangea, and that during the employment and following the termination
         of the employment, you will agree to ensure that the confidential
         information, trade secrets and intellectual property of Pangea will not
         be obtained by any third parties. Furthermore, the Agreement provides
         that you will devote your full time and effort exclusively to this
         employment (except as consented to in writing by the President or CEO
         of Pangea) and apply all your skill and experience to the performance
         of your duties and advancing the Company's interest.

-        Delivery to the company of appropriate identification that verifies
         your eligibility to work in the United States in accordance with the
         Immigration Reform Control Act of 1986 (see the enclosed list).

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Employment with Pangea Systems, Inc. is "at will" and not for a specific term.
It can be terminated by you or by the company at any time for any reason, with
or without cause. Any contrary representations that may have been made to you
are superseded by this offer. Any modifications to this at-will term of your
employment must be in writing and signed by you and the President of Pangea
Systems, Inc. Pangea Systems reserves the right to make changes to corporate
personnel policy as required. If you accept this offer, you may receive copies
of company policies and plans in effect from time to time and agree to abide by
them. Note that theses policies and plans may change at any time and they are
not to be construed as a contract of employment.

This letter constitutes the complete agreement concerning your employment with
Pangea Systems, Inc. and supersedes all prior written or oral statements, which
may have been made to you. Any statements made by a representative of Pangea
which contradict this offer letter are not authorized or binding unless
accompanied by a written confirmation from the Chief Executive Officer of
Pangea. This offer will expire ten (10) days after the date of this letter.

Please mail or fax (510-628-0110) your signed letter to Anita Cota,
Executive/Legal Administrator, in acceptance of this employment offer prior to
your start date. Keep the additional copy for your records. Plan to bring
appropriate identification and executed employment documents to this meeting.

Rob, we are delighted to have you become a part of the Pangea Systems team, and
we look forward to working with you. Please feel free to call me if you have any
questions.

Sincerely,

/s/ H. Ward Wolff

H. Ward Wolff
Senior Vice President and CFO

Enclosure:        Exhibit A
                  Pangea Systems Employment Agreement
                  Information on appropriate identification of eligibility to
                  work in the U.S.

                                   ACCEPTANCE

I have read and understand the foregoing which constitutes the entire
understanding between Pangea Systems and the undersigned, and I accept
employment with the company subject to the terms and conditions contained
herein.

/s/ Robert F. Williamson                               21.07.99
---------------------------------                      -------------------------
Robert F. Williamson                                   Date

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                                    EXHIBIT A

                              Robert F. Williamson
                          SUMMARY TERMS AND CONDITIONS

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<S>                                        <C>
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TITLE AND DUTIES:                          Title:  Senior Vice President,
                                           Marketing, Business Development and
                                           Ecommerce

                                           Job Description: As Senior Vice
                                           President, Marketing, Business
                                           Development and Ecommerce, you will
                                           be responsible for managing all areas
                                           of marketing and business development
                                           for the company, including product
                                           management, marketing communications,
                                           user publications and business
                                           development. This role includes
                                           managing all marketing activities for
                                           the company's products and services,
                                           including creating product plans,
                                           establishing pricing models, managing
                                           competitive research and analysis,
                                           determining product positioning and
                                           distribution strategy, coordinating
                                           new products launches and new product
                                           sales training, guiding third party
                                           development programs, and managing
                                           strategic alliance and business
                                           partnering initiatives. In this
                                           capacity, you will be responsible for
                                           the overall coordination, management,
                                           introduction and strategic and
                                           functional definition of the
                                           company's Ecommerce initiative,
                                           currently described as Mygene.com. In
                                           addition, you will be expected to
                                           participate in setting the strategic
                                           direction of the company as a member
                                           of the executive management team.

                                           These duties and responsibilities may
                                           be expanded or contracted from
                                           time-to-time at the discretion of the
                                           CEO.

------------------------------------------ -------------------------------------
REPORTING TO:                              John Couch, President & CEO

------------------------------------------ -------------------------------------
BONUS:                                     Signing bonus of $16,250.00

------------------------------------------ -------------------------------------
START DATE:                                July 19, 1999

------------------------------------------ -------------------------------------
STARTING SALARY:                           $16,250.00 per month, payable on the
                                           last day of each month.  Position is
                                           exempt.

                                           Standard employment deductions (e.g.
                                           required federal, state, and local
                                           taxes) will be withheld.

------------------------------------------ -------------------------------------
BONUS PLAN:                                You will be eligible to participate
                                           in Pangea's Management Bonus Plan,
                                           which is anticipated to be
                                           implemented in Q3 1999.

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

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CONTRIBUTION PLAN:                         Pangea has established a 401(k) plan
                                           with PaineWebber.  No company
                                           matching funds are provided at this
                                           time.  However, the plan allows for
                                           discretionary end-of-the-year company
                                           contributions.

------------------------------------------ -------------------------------------
HEALTH BENEFITS:                           Pangea provides health and dental
                                           benefits through Blue Cross of
                                           California and through Kaiser.
                                           Employees may choose between an HMO
                                           plan and a Preferred Provider
                                           Organization (PPO).

                                           Pangea will pay 95% of the cost of
                                           the HMO plan for employees plus 70%
                                           of the cost of the HMO coverage for
                                           employees' dependants. Additional
                                           costs for coverage under the PPO
                                           shall be borne by the employee.

                                           Pangea will provide life insurance
                                           and long term disability coverage at
                                           no expense to the employee.

------------------------------------------ -------------------------------------
PAID TIME OFF:                             You will have three weeks paid time
                                           off during the first year of your
                                           employment, which shall accrue over
                                           the course of the year on a bi-weekly
                                           basis.

------------------------------------------ -------------------------------------
STOCK OPTIONS:                             Subject to Board approval, you will
                                           be granted stock options to purchase
                                           750,000 shares of common stock of the
                                           company, which will vest over four
                                           years of continuing employment with
                                           the company. The options will vest
                                           monthly after a cliff period of six
                                           months. The terms and conditions of
                                           your options will be subject to a
                                           Stock Option Agreement. The options
                                           are designed to qualify as Incentive
                                           Stock Options under the U.S. Income
                                           Tax Code, thus the exercise price of
                                           the options will be based on the fair
                                           market value of the company at the
                                           time of grant.

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

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CHANGE IN CONTROL:                         Upon the occurrence of a merger of
                                           the Company with or into any other
                                           entity or a sale or conveyance by the
                                           Company of all or substantially all
                                           of its assets to any other entity in
                                           a transaction in which the
                                           stockholders of the Company
                                           immediately before the transaction
                                           less than a majority of the
                                           outstanding voting securities of the
                                           surviving entity or its parent (a
                                           "Change in Control"), fifty percent
                                           (50%) of the unvested shares subject
                                           to the options held by you
                                           immediately prior to such Change in
                                           Control will vest and become
                                           exercisable as of the date of the
                                           Change in Control.

                                           In addition, upon the involuntary or
                                           constructive termination of your
                                           employment with the Company, or a
                                           successor entity, without cause
                                           either immediately prior to and in
                                           connection with, or within one year
                                           following a Change in Control, you
                                           will be entitled to:

                                                  (a) severance pay equal to six
                                                  (6) months annual base salary,
                                                  to be paid in a lump sum
                                                  amount or monthly over the
                                                  relevant time period, at the
                                                  discretion of the Company;
                                                  and;

                                                  (b) the immediate and
                                                  accelerated vesting prior to
                                                  such termination of 50% of the
                                                  then unvested shares subject
                                                  to your options.

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