Document:

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                                                                   EXHIBIT 10.17

                      [MACHONE COMMUNICATIONS LETTERHEAD]

                                  May 15, 1997

VIA HAND DELIVERY

Matt Stepovich
19672 Stevens Creek Blvd. #422
Cupertino, CA 95014

Dear Matt,

We are very pleased to offer you the position of Director, Office of the
President with MachOne Communications. You will report directly to the
President.

Your initial salary will be $96,000.00 annually. Until the initial bridge
financing has been completed, the company will defer payment on one fourth of
your salary, $2,000 per month, and the deferred salary will be paid in a lump
sum upon completion of the bridge financing. Your initial salary will be
adjusted upward when the company has obtained its initial round of funding.

In addition, you will be granted 72,000 shares of MachOne founders' stock at the
founders' stock purchase price. Those shares will be subject to a declining
right of repurchase by the company such that six months from the above date, the
repurchase right will terminate on one eighth of your shares and thereafter, the
right of repurchase on one forty-eighth of the shares will terminate after each
month of the next forty-two months of your employment with the company. Under
that plan, which will be set forth in a Founders' Stock Purchase Agreement, your
shares will have completely "vested" after 48 months with the company. In the
event there is a change in control of the company and the company does not
continue your employment, the right to repurchase will terminate, in essence
accelerating the vesting of your options. Your vesting will accelerate in the
event of an IPO.

A bonus program including stock options or cash will also be put in place by the
beginning of next year. Seventy five percent of your bonus will be automatic
based on company performance and twenty five percent will be based upon your
reaching mutually agreed upon personal goals.

MachOne will offer full medical and dental coverage for benefits once financing
has been secured. As the company expands, we will offer a 401k and other
benefits. Our option plan is presently being prepared and will provide the
maximum tax benefits to all of our employees. The company will either have ISO
qualified options or we will provide purchase contracts with company repurchase
options to guarantee capital gains treatment of the stock.

Regards,

/s/ PETER D. OLSON
-------------------
Peter D. Olson
President & CEO

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                                                                 EXHIBIT 10.17

                              EMPLOYMENT AGREEMENT

         This Employment Agreement is made and entered into by and between
MachOne Communications, Inc. ("Company") and Matthew J. Stepovich ("Employee")
effective as of January 1, 1998.

                                  I. Recitals.

                  A.       MachOne's predecessor began business on April 15,
         1997 as FastBit Communications and changed its name to MachOne
         Communications on May 1, 1997. MachOne Communications, Inc. was
         incorporated on August 18, 1997 (the foregoing businesses referred to
         herein, collectively, as the "Company").

                  B.       Company began employing Employee as its Director of
         the Office of the President beginning on May 15, 1997.

                  C.       This Agreement is intended to formalize in writing
         certain agreements which have been in effect since the time Employee
         was initially employed by Company and shall supersede the offer letter
         from Company to Employee dated May 15, 1997.

                  D.

         NOW, THEREFORE, the foregoing is incorporated herein by reference and,
in exchange for the mutual covenants contained below, the parties agree as
follows:

                                II. Definitions.

         A. "COMMENCEMENT DATE" shall mean May 1, 1997.

         B. "GOOD REASON" shall mean any of the following conditions: (i) a
decrease in Employee's base salary and/or bonus compensation; (ii) a material,
adverse change in Employee's title, authority, responsibilities or duties; (iii)
Company's relocation of the principal place of Employee's employment more than
fifty (50) miles; (iv) Company's material breach of any provision of this
Agreement; (v) Company's failure to obtain the assumption of this Agreement by
Company's successor or assign; (vi) Company's failure to continue Employee's
opportunity to participate, on the same or more favorable terms, in benefit or
compensation

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programs in which Employee was participating; or (vii) any purported termination
of Employee's employment for "material breach of contract" which is not effected
following a written notice and reasonable opportunity to cure.

         C. Termination for "CAUSE" shall mean: (i) Employee's theft,
dishonesty, or falsification of any Company documents or records; (ii)
Employee's improper use or disclosure of Company's confidential or proprietary
information; (iii) any intentional act by Employee that has a materially
detrimental effect on Company's reputation or business; (iv) Employee's failure
to perform any reasonable assigned duties after written notice from Company and
a reasonable opportunity to cure; or (v) any uncured material breach by Employee
of any written agreement between Employee and Company.

                           III. Position and Duties.

         Employee shall be employed by MachOne as its Vice President of Legal
and Regulatory Affairs reporting only to the President, effective as of the
Commencement Date. In that position, Employee agrees to devote his full business
time, energy and skill to his duties at MachOne. Employee and MachOne agree that
he will perform such duties at MachOne's principal place of business, which
shall be 992 South De Anza Blvd., San Jose, CA 95129. These duties shall
include, among other things, coordinating the various legal counsel and firms
that will provide legal advice to Company, administering all contracts and
contract negotiations for the Company, managing the Company's involvement in
regulatory processes, and directing interconnection negotiations with incumbent
local exchange carriers and related strategies. Employee will also manage the
administrative and operational functions of the Company offices.

                                   IV. Term.

         Employee's employment with MachOne will be for no specified term and
may be terminated by MachOne or Employee at any time, with or without cause.
Upon the termination of Employee's employment with MachOne for any reason,
neither MachOne nor Employee shall have any further obligation or liability
under this Agreement to the other, except as set forth in paragraphs V, VI, VII,
IX and X, below.

                                V. Base Salary.

         In the position as outlines above, Employee shall be paid a monthly
Base Salary of $8,000 per month ($96,000 on an annualized basis), subject to
applicable withholding, in accordance with MachOne's normal payroll procedures.
The Base Salary shall be adjusted upward 20% to $10,000/month upon the
occurrence of the completion of an equity financing in which MachOne issues
shares of its equity securities or any securities convertible into or
exchangeable therefor, or any grant of rights to acquire its equity securities
and receives net proceeds in an aggregate of at least Three Million Dollars
$3,000,000 in consideration for such issuance.

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                                 VI. Benefits.

         Employee shall be entitled to the benefits afforded to other members of
the Company's executive management under the Company's vacation, holiday and
business expense reimbursement policies. Employee shall be entitled to the
medical and dental benefits provided to other employees of MachOne.

         A. Benefits Upon Voluntary Termination: In the event of Employee's
voluntary termination from employment with Company, or in the event that
Employee's employment terminates as a result of his death, Employee shall be
entitled to no compensation or benefits from Company other than those earned
through the date of such termination or in the case of any stock options, vested
through the date of such termination (except as specifically set forth otherwise
in provisions below).

         B. Benefits Upon Other Termination. In the event of the termination of
Employee's employment by MachOne for the reasons set forth below, he shall be
entitled to the following:

                  1. Termination for Cause. If Employee's employment is
         terminated by MachOne for Cause, Employee shall be entitled to no
         compensation or benefits, from MachOne other than those earned under
         through the date of termination (which shall include bonuses for the
         fiscal year then in progress determined on a pro rated basis), or in
         the case of any stock options, vested through the date of termination.

                  2. Termination Without Cause. If Employee is terminated by
         Company for any reason other than for Cause (or resigns for Good
         Reason), Employee shall be entitled to all accrued compensation
         (including pro-rated bonuses), salary and benefits for three months
         following termination, plus continued vesting of the Shares for a
         period of six (6) months.

         C. Vesting Upon Death or Disability. If Employee's employment ceases as
a result of death or disability, as of the date of such termination the Shares
that have vested (the "Vested Percentage") at the time of such cessation shall
then be multiplied by a factor of two (2) (but in no case shall the Vested
Percentage exceed 100%).

                                  VII. Bonus.

         Employee shall have the opportunity to earn an annual Performance Bonus
for each fiscal year, beginning with fiscal year 1998. This Performance Bonus
shall be based 75% upon the Company's achievement of the fiscal goals it
establishes as the Company's threshold for executive level employee bonuses (the
"Company Objectives"), and 25% based on performance objectives specifically
related to Employee's areas of responsibility (the "Performance Objectives").
The Company Objectives and the Performance Objectives (together, the
"Objectives") shall be determined in good faith and set forth on Exhibit A. For
subsequent fiscal years, the Company Objectives shall be the fiscal goals that
the Company establishes as the threshold for executive level employee bonuses.
The Performance Objectives and the Target Bonus shall be negotiated annually in
good faith by the parties during the fourth quarter of each fiscal year for the
upcoming fiscal year.

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                    VIII. Inventions and Proprietary Rights.

         Employee agrees to abide by the terms and conditions of MachOne's
standard Employee Inventions and Proprietary Rights Assignment Agreement as
executed by Employee and attached hereto as Exhibit A.

                     IX. Agreement Not to Compete Unfairly.

         Employee agrees that in the event of his termination at any time and
for any reason, he shall not compete with MachOne in any unfair manner,
including, without limitation, using any confidential or proprietary information
of MachOne to compete with MachOne in any way. Employee agrees that for a period
of one (1) year after the date of the termination of his employment for any
reason, he shall not, either directly or indirectly, solicit the services, or
attempt to solicit the services, of any employee of MachOne to any other person
or entity.

                             X. General Provisions.

         A. Dispute Resolution: In the event of any dispute or claim relating to
or arising out of this Agreement (including, but not limited to, any claims of
breach of contract, wrongful termination or age, sex, race or other
discrimination), Employee and MachOne agree that all such disputes shall be
fully and finally resolved by binding arbitration conducted by the American
Arbitration Association in Santa Clara County, California in accordance with its
National Employment Dispute Resolution rules, as those rules are currently in
effect (and not as they may be modified in the future). Employee acknowledges
that by accepting this arbitration provision he is waiving any right to a jury
trial in the event of such dispute. Provided, however, that this arbitration
provision shall not apply to any disputes or claims relating to or arising out
of the misuse or misappropriation of trade secrets or proprietary information.

         B. Attorneys' Fees: The prevailing party shall be entitled to recover
from the losing party its attorneys' fees and costs incurred in any action
brought to enforce any right arising out of this Agreement.

         C. Interpretation: Employee and MachOne agree that this Agreement shall
be interpreted in accordance with and governed by the laws of the State of
California.

         D. Successors and Assigns: This Agreement shall inure to the benefit of
and be binding upon MachOne and its successors and assigns. In view of the
personal nature of the services to be performed under this Agreement by
Employee, he shall not have the right to assign or transfer any of his rights,
obligations or benefits under this Agreement, except as otherwise noted herein.

         E. Entire Agreement: This Agreement constitutes the entire employment
agreement between Employee and Company regarding the terms and conditions of his
employment, with the exception of (i) the Employee Inventions and Proprietary
Rights Assignment Agreement described in paragraph VII and (ii) any Founders'
Stock Purchase Agreement between Employee and Company. This Agreement supersedes
all prior negotiations, representations or agreements between Employee and
Company, whether written or oral, concerning Employee's employment by Company.

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         F. Validity: If any one or more of the provisions (or any part thereof)
of this Agreement shall be held invalid, illegal or unenforceable in any
respect, the validity, legality and enforceability of the remaining provisions
(or any part thereof) shall not in any way be affected or impaired thereby,
while giving the greatest possible effect to the parties' intent and the
exchange of consideration set forth in the Agreement.

         G. Modification: This Agreement may only be modified or amended by a
supplemental written agreement signed by Employee and MachOne.

         IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date and year written below.

                                        MACHONE COMMUNICATIONS, INC.

Date: 1/3/98                            By: /s/ PETER D. OLSON
     --------------------------            -------------------------------
                                        Its: PRESIDENT
                                           -------------------------------

                                        EMPLOYEE

Date: 1/3/98                            Signature: /s/ MATT STEPOVICH
     --------------------------            -------------------------------
                                        Printed Name:  Matt Stepovich

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                                                                       EXHIBIT A

                             Performance Objectives

                            Target Bonus:
                                          ---------

Company Goals:

Personal Goals:

Initials:

----------------------------         ---------------------------------
Company Signatory                    Employee

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                                                                   EXHIBIT 10.18

                             [TELOCITY LETTERHEAD]

                                                              September 13, 1999

TRANSMITTED VIA FACSIMILE

Regina Wiedemann
1017 Twin Brooks Dr.
San Jose, CA 95126
Fax (408) 995-6558

Dear Regina,

We are pleased to offer you the regular full time position as Senior Vice
President of Business Development with Telocity. You will report directly to
me. Your anticipated start date would be October 1, 1999.

If you accept the offer, you will receive a monthly salary of $11,666.67, which
will be paid in two installments, on the fifteenth and last day of each month,
in accordance with the Company's normal payroll procedures.

If you accept this offer, upon approval by the Company's Board of Directors you
will be granted options to purchase 120,000 shares of the Company's common
stock with a per share purchase price equal to the fair market value at the time
of the grant. The options will vest over a four-year period calculated based on
your original start date with the Company. On the six-month anniversary of your
actual start date, your vesting "cliff" will occur, meaning the first 1/8 of
your options will vest. Thereafter, 1/42nd of your remaining options will vest
on the first day of each month that you work continuously as a regular employee
of the Company until your options have fully vested.

Telocity offers full medical and dental coverage benefits for its employees, for
which you will become eligible on your first day of employment. The Company
offers a 401(k) Savings Plan and section 125 Pretax Savings for which you will
be eligible on the 1st of the following month of employment.

If you choose to accept the offer, your employment with the Company will be
voluntarily entered into and will be for no specified period. As a result, you
will be free to resign at any time, for any reason or for no reason, with or
without Cause, as you deem appropriate. The Company will have a similar right
and may terminate your employment at any time, for any reason or no reason,
with or without Cause, provided that the following provisions will apply to
terminations or resignations, as described below, after a "Change of Control."
A "Change of Control" will be deemed to have occurred if any of the following
occurs with respect to the Company: (i) the direct or indirect sale or exchange
in a single or series of related transactions by the stockholders of the Company
of more than fifty percent (50%) of the voting stock of the Company; (ii) a
merger or consolidation in which the Company is a party; (iii) the sale,
exchange, or transfer of all or substantially all of the assets of the Company;
or (iv) a liquidation or dissolution of the Company. For the purposes of
Subsection (i), above, the board shall have the right to determine whether
multiple sales or exchanges of the voting stock of the Company are related, and
its determination shall be final, binding and conclusive.

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                                                              September 13, 1999
                                                                     Page 2 of 3

"Good Reason" for a resignation will be deemed to exist if any of the following
conditions occur within one (1) year of a Change in Control, provided that such
conditions persist for fifteen (15) business days after written notice to the
Board from you and reasonable opportunity for the Company to cure: (i) the
Company, its successor or assign decreases your salary or compensation; (ii) the
Company its successor or assign makes a material, adverse change in your title,
authority, responsibilities or duties, as measured against your title,
authority, responsibilities or duties immediately prior to such Ownership Change
Event; (iii) the Company its successor or assign requires you to relocate your
work place to a location outside the San Francisco Bay Area (i.e., outside Marin
County, Contra Costa County, Alameda County, San Francisco County, San Mateo
County or Santa Clara County); (iv) the Company its successor or assign
materially breaches any provision of this Agreement; or (v) the Company fails to
obtain the assumption of this Agreement by any successor or assign of the
Company.

Termination for "Cause" is defined as a termination based upon: (i) theft,
dishonesty, or falsification of any employment or Company records; (ii)
conviction of a felony or any act involving moral turpitude; (iii) the refusal
to perform any reasonable, assigned duties; (iv) improper disclosure of the
Company's confidential or proprietary information; (v) any act you may
undertake with the intent to (or with reckless disregard of the likelihood that
your action may) materially harm the Company's reputation or business; or (vi)
any material breach of this Employment Agreement, which breach, if curable, is
not cured within thirty (30) days following written notice from the Company.

In the event that the Company terminates your employment for Cause after a
Change in Control, you would then be entitled to no compensation or benefits
from the Company other than salary, vesting (if any), bonuses and benefits
earned prior to such termination for Cause.

If, after a Change in Control, the Company were to terminate your employment
without Cause, or if, after a Change in Control, you were to resign from the
Company for Good Reason, then you would be entitled, on such date, to all of
the following, as your exclusive compensation and remedy: (i) All accrued
salary, benefits; vesting (if any) and bonuses (if any) earned through the date
of termination or resignation; (ii) Continued salary (less applicable
withholding) benefits and vesting at the above base salary rate (plus any
increases), for six (6) months following such termination or resignation; and
(iii) Removal of the "cliff date" described in paragraph three of this
Agreement. The latter provision means that if the Company were to terminate
your employment without Cause or you were to resign for Good Reason during the
first six months of your employment, you would be entitled to monthly vesting
through the date of such event despite the cliff, which otherwise would require
you to work as an employee of the Company for six months before any vesting
would accrue. At such time you would also be entitled to an additional six
months vesting as provided in section (ii) of this paragraph.

For purposes of federal immigration law, you will be required to provide the
Company documentary evidence of your identity and eligibility for employment in
the United States. Such documentation must be provided to us within three
business days of your date of hire, or our employment relationship with you may
be terminated. You will also be required to sign an Employee Inventions and
Proprietary Rights Assignment Agreement as a condition of your employment
(attached).

In the event of any dispute or claim relating to or arising out of our
employment relationship, this agreement, or the termination of our employment
relationship (including but not limited to claims of wrongful termination or
age, sex, disability, race or other discrimination or harassment), you and the
Company agree that all such disputes shall be fully and finally resolved by
binding arbitration conducted by the American Arbitration Association in Santa
Clara County, California. By making this agreement, both you and the Company
waive our respective

This Document Highly Confidential
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                                                               September 9, 1999
                                                                     Page 3 of 3

rights to have such disputes tried by a court or jury. However, we agree that
this arbitration provision will not apply to any disputes or claims relating to
the misuse or misappropriation of trade secrets or proprietary information.

This letter and the Employee Inventions and Proprietary Rights Assignment
Agreement set forth terms of your employment with the Company and supersede any
prior representations or agreements, whether written or oral. This letter may
not be modified or amended except by a written agreement signed by both parties.

To indicate your acceptance of the Company's offer, please sign and date this
letter, and the enclosed Employee Inventions and Proprietary Rights Agreement.
Return both pages of this letter by fax to our confidential fax number (408)
863-4783, no later than the close of business on Friday, September 10, 1999.

This offer is highly confidential, so please do not disclose its terms to
anyone other than your advisor(s). Please bring both the originals of the
letter and the Agreement with you on your first day with the Company.

We at Telocity are excited about the prospect of you joining our team. We look
forward to working together.

Sincerely,

/s/ PATTI S. HART
Patti Hart
President and CEO

Enclosures

Agreed to and Accepted:

/s/ REGINA WEIDEMANN      9/13/99
----------------------------------
Regina Wiedemann          Date

This Document Highly Confidential

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