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Exhibit 10.24

January 6, 2003

Mr. Peter Marcil
Managing Director, Investment Banking
The Seidler Companies Incorporated
14500 North Northsight Blvd
Suite 205
Scottsdale, AZ 85260

Dear Peter,

This letter will serve as an amendment to the Agreement ("Agreement") dated
May 6, 2002 between VitalStream Holdings, Inc. (f/k/a/ Sensar Corporation,
"VitalStream") and The Seidler Companies Incorporated ("Seidler"). By signing
below, both parties agree that effective immediately, the Agreement is hereby
amended as follows:

1.)The first paragraph of the letter is amended to read as follows:

This letter-form agreement (the Agreement") confirms that VitalStream
Holdings, Inc. (the "Company" or "VitalStream") has engaged The Seidler
Companies Incorporated ("Seidler") in the capacity of exclusive financial
advisor and exclusive placement agent for the purpose of advising and assisting
the Company in connection with: (i) Corporate Transactions (as defined below),
and in the capacity of non-exclusive financial advisor and non-exclusive
placement agent for the purpose of advising and assisting the Company in
connection with: (ii) Financings (as defined below); and (iii) other investment
banking matters. As used in this Agreement, the term "Corporate Transactions"
means any acquisition by the Company of all or substantially all of the stock or
assets of another business entity (a "Target") or any sale, merger,
consolidation, recapitalization, reorganization, or other business combination
involving the Company. As used in this Agreement the term "Financing" means any
transaction involving the raising of equity capital, mezzanine capital
(convertible debt, subordinated debt with warrants or other quasi-equity
securities), or senior indebtedness if the person or entity providing capital to
the Company was first introduced to the Company by Seidler during the term of
this Agreement. The Company shall have no obligation to accept and agree to the
terms of any Financing or Corporate Transaction presented by Seidler.

2.)Item #12 is deleted in its entirety.

Please indicate your agreement with the above-mentioned by signing below.

Regards,

/s/ Paul Summers

Paul Summers
Chief Executive Officer

Agreed and Accepted:

/s/ Peter Marcil

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Peter Marcil, Managing Director Investment Banking
 

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Date

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AMENDMENT TO CONFIRMATION LETTER

January 9, 2003

Mr. Peter Marcil
Managing Director Investment Banking
The Seidler Companies Incorporated
14500 North Northsight Blvd.
Suite 205
Scottsdale, AZ 85260

Dear Peter:

This letter amends that certain letter agreement dated May 6, 2002 (the "Letter
Agreement") between VitalStream Holdings, Inc. ("VitalStream") and The Seidler
Companies, Inc. ("Seidler"), as amended by that Confirmation Letter dated
October 25, 2002 (which Confirmation Letter this letter supersedes and replaces)
and the letter-form amendment dated January 6, 2003. In connection with
VitalStream's purchase, through a subsidiary, of certain assets of Epoch
Hosting, Inc. and its affiliates (the "Asset Purchase") and the investment of
$1,100,000 by Dolphin Communications Fund II, LP and Dolphin Communications
Parallel Fund II, LP (the "Note Purchase"), VitalStream agrees to pay to Seidler
the following consideration:

1.$100,000 cash

a.$50,000 payable at Closing ("Closing" as defined in the Asset Purchase
Agreement governing the Asset Purchase)

b.$50,000 payable 120 days after Closing

2.A warrant to purchase 200,000 shares of VitalStream common stock at an
exercise price of $0.35 per share, expiring 5 years after the date of issue, and
a warrant to purchase 200,000 shares of VitalStream common stock at an exercise
price per share equal to the closing market price per share of VitalStream's
common stock on the date of the Closing, expiring 5 years after the date of
issue. Such warrants are issued in lieu of the "Success Warrant" (as defined in
the Letter Agreement), and the issuance of such warrants fully satisfies the
obligations of VitalStream under Section 3b of the Letter Agreement. Such
warrants will be issued in the form attached to the Letter Agreement as
Exhibit B.

3.As an incentive for Seidler to help further VitalStream's interests, upon the
closing of either a Corporate Transaction or Financing (as such terms are
defined in the January 6, 2003 letter-form amendment that is part of the Letter
Agreement), (excluding the Asset Purchase and the Note Purchase), VitalStream
will issue to Seidler a warrant to purchase 250,000 shares of VitalStream common
stock at an exercise price of $0.35 per share, expiring 5 years after the date
of issue. Such warrant will be issued in the form attached to the Letter
Agreement as Exhibit B.

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Amendment to Confirmation Letter
January 9, 2003
Page 2

Seidler agrees that the item numbers 1 & 2 above represent payment in full of
all fees which would be due to Seidler for their work in connection with the
Asset Purchase and the Note Purchase, including any obligations of VitalStream
under Section 3.c or 3.d of the Letter Agreement. Such payment and warrant
issuance shall be conditioned in their entirety upon the successful closing of
the Asset Purchase.

In addition, a new item 12 shall be added to the Letter Agreement (replacing the
item 12 deleted by means of the letter-form amendment dated January 6, 2003),
the text of which is as follows:

12.The Company agrees that no other financial advisor is or will be authorized
by it during the term of this Agreement to perform services with respect to
Corporate Transactions on its behalf of the type which Seidler is authorized to
perform hereunder as described in the introductory paragraph of this Agreement.
The foregoing does not prohibit the Company from engaging financial advisors
with respect to Financings to provide service of the type Seidler is authorized
to perform hereunder. Except as otherwise provided in Section 3, no fee payable
to any other financial advisor either by the Company or any other entity shall
reduce or otherwise affect the fees payable hereunder to Seidler.

Please indicate your agreement with this Amendment to Confirmation Letter by
signing below.

Regards,

/s/ Kevin D. Herzog

Kevin D. Herzog
Chief Financial Officer

Agreed & Accepted:

/s/ Peter Marcil

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Peter Marcil, Managing Director Investment Banking
 
Date

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Exhibit 10.24

AMENDMENT TO CONFIRMATION LETTER