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Exhibit 10.29

Execution Copy

SECOND AMENDMENT TO
THE OPERATING AGREEMENT OF
RIGGS CAPITAL PARTNERS II, LLC

a Delaware Limited Liability Company

THIS SECOND AMENDMENT is entered into as of January 1, 2003 (the First
Amendment), by and between RIGGS NATIONAL CORPORATION (the Managing Member
and a Member), RCP INVESTMENTS II, LLC (a Member) and RCP VENTURE
MANAGEMENT INC. (Investment Advisor) amending the Operating Agreement of
RIGGS CAPITAL PARTNERS II, LLC, a Delaware limited liability company (the
Company), dated as of the 1st day of October, 2000, as amended by that First
Amendment to the Operating Agreement of Riggs Capital Partners II, LLC dated as
of January 1, 2002 (First Amendment) and as joined by RCP Venture Management
Inc. by Joinder to the Operating Agreement of Riggs Capital Partners II, LLC.
The original Agreement, First Amendment and Joinder are collectively referred
to herein as the (Operating Agreement).

WITNESSTH

WHEREAS, the sole Members of the Company are Riggs National Corporation
and RCP Investments II, L.L.C.;

WHEREAS, the Members and RCP Ventures Management Inc. wish to amend
Section 5.9 of the Original Agreement to state that the compensation to be paid
to the Investment Advisor will be equal to $172,500 per year or .575% of
$30,000,000;

NOW, THEREFORE, in consideration of the premises and mutual promises
hereinafter set forth, the parties hereto do hereby amend the Original
Agreement as follows:



|1. |  | Section 5.9 of the Original Agreement is hereby amended such that the
Investment Adviser shall hereafter be entitled to a management fee equal
to .575% of $30,000,000 or One Hundred Seventy-Two Thousand Five Hundred
Dollars ($172,500) per annum.                                                                                                                       
|-- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|  
|2. |  | Except as specifically provided herein, the Original Agreement shall
remain in full force and effect. This Second Amendment may be executed in
any number of counterparts, all of which shall constitute a single
instrument. This Second Amendment shall be binding upon and inure to the
benefit of the parties hereto and their respective heirs, successors and
assigns.

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IN WITNESS WHEREOF, the undersigned have set their hands as of the day and
year first above written.

|                                                          |  |                                                                      
|--------------------------------------------------------- |  | ---------------------------------------------------------------------
|Managing Member:                                          |  | Member:                                                              
|                                                         
|RIGGS NATIONAL CORPORATION                                |  | RCP INVESTMENTS II, LLC                                              
|                                                         
|By: /s/ Timothy C. CoughlinTimothy C. Coughlin, President |  | By: /s/ J. Carter Beese, Jr.J. Carter Beese, Jr., its General Partner
|                                                         
|                                                          |  | Investment Advisor:                                                  
|                                                         
|                                                          |  | RCP VENTURE MANAGEMENT INC.                                          
|                                                         
|                                                          |  | By: /s/ J. Carter Beese, Jr.J. Carter Beese, Jr., Chairman and CEO   

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