Document:

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                                                                   Exhibit 10.52

                          HOUSTONSTREET EXCHANGE, INC.

                                SERIES C WARRANT

Exercisable and Expires in                Right to Purchase 1,250,000
Accordance with the Agreement             shares of Series C Preferred Stock
                                          (subject to adjustment)

No. W-C006

                                    PREAMBLE

         HOUSTONSTREET EXCHANGE, INC. (the "Company"), a Delaware corporation,
hereby certifies that, for value received, James S. Gordon ("Holder") is
entitled, subject to the terms set forth below, to purchase from the Company
fully paid and nonassessable shares of Series C Preferred Stock, $0.01 par
value, of the Company, at the purchase price per share (the "Purchase Price") of
the $.15 (the "Initial Purchase Price"). The number and character of such shares
of Series C Preferred Stock and the Purchase Price are subject to adjustment as
provided in Sections 1 and 9 of the Agreement.

         This Warrant is one of the Series C Stock Purchase Warrants (the
"Warrants"), evidencing the right to purchase shares of Series C Preferred Stock
of the Company, issued pursuant to the Warrant Agreement dated as of even date
herewith among the Company and the other parties to the Agreement, a copy of
which is on file at the principal office of the Company. The Warrants evidence
rights to purchase an aggregate of 1,250,000 shares of Series C Preferred Stock
of the Company (the "Shares"), subject to adjustment as provided in Sections 1
and 9 of the Agreement (the adjustment pursuant to Section 1 referring solely to
additional shares of Series C Preferred Stock as may be requested by the Holder
as provided by Section 2 of the Senior Secured Promissory Note issued in favor
of the Holder). Capitalized terms used herein but not defined herein shall have
the meaning set forth in the Series C Preferred Stock Warrant Agreement of even
date herewith.

     1.  Restricted Shares.

         The holder of this Certificate by its acceptance covenants and agrees
that this Warrant and the Shares are Restricted Shares in accordance with
Section 7 of the Agreement, and may only be transferred in accordance with that
section.

     2.  Exercise of Warrant.

         The holder of this Warrant may exercise it in accordance with
paragraphs 1 and 4 of the Agreement.

     3.  Purchase Price and Shares.

         The Purchase Price and number of Shares issuable hereunder may be
adjusted in accordance with Sections 1 and 9 of the Agreement (the adjustment
pursuant to Section 1
<PAGE>
referring solely to additional shares of Series C Preferred Stock as may be
requested by the Holder as provided by Section 2 of the Senior Secured
Promissory Note issued in favor of the Holder).

     4.  The Agreement.

         This Warrant is subject to all other terms of the Agreement.

Dated:  March 30, 2001             HOUSTONSTREET EXCHANGE, INC.

(Corporate Seal)                   By: /s/ Frank W. Getman Jr.
                                       -----------------------------------------
                                       Frank W. Getman Jr.
                                       Its President & Chief Executive Officer

Attest: /s/ Cynthia A. Johnson<PAGE>
                                                                   Exhibit 10.53

                          HOUSTONSTREET EXCHANGE, INC.

                                SERIES C WARRANT

Exercisable and Expires in                    Right to Purchase 600,000
Accordance with the Agreement                 shares of Series C Preferred Stock
                                              (subject to adjustment)

No. W-10

                                    PREAMBLE

         HOUSTONSTREET EXCHANGE, INC. (the "Company"), a Delaware corporation,
hereby certifies that, for value received, Omega Advisors, Inc. ("Holder") is
entitled, subject to the terms set forth below, to purchase from the Company
fully paid and nonassessable shares of Series C Preferred Stock, $0.01 par
value, of the Company, at the purchase price per share (the "Purchase Price") of
the $.15 (the "Initial Purchase Price"). The number and character of such shares
of Series C Preferred Stock and the Purchase Price are subject to adjustment as
provided in Sections 1 and 9 of the Agreement.

         This Warrant is one of the Series C Stock Purchase Warrants (the
"Warrants"), evidencing the right to purchase shares of Series C Preferred Stock
of the Company, issued pursuant to the Warrant Agreement dated as of even date
herewith among the Company and the other parties to the Agreement, a copy of
which is on file at the principal office of the Company. The Warrants evidence
rights to purchase an aggregate of 600,000 shares of Series C Preferred Stock of
the Company (the "Shares"), subject to adjustment as provided in Sections 1 and
9 of the Agreement (the adjustment pursuant to Section 1 referring solely to
additional shares of Series C Preferred Stock as may be requested by the Holder
as provided by Section 2 of the Senior Secured Promissory Note issued in favor
of the Holder). Capitalized terms used herein but not defined herein shall have
the meaning set forth in the Series C Preferred Stock Warrant Agreement of even
date herewith.

     1.  Restricted Shares.

         The holder of this Certificate by its acceptance covenants and agrees
that this Warrant and the Shares are Restricted Shares in accordance with
Section 7 of the Agreement, and may only be transferred in accordance with that
section.

     2.  Exercise of Warrant.

         The holder of this Warrant may exercise it in accordance with
paragraphs 1 and 4 of the Agreement.

     3.  Purchase Price and Shares.

         The Purchase Price and number of Shares issuable hereunder may be
adjusted in accordance with Sections 1 and 9 of the Agreement (the adjustment
pursuant to Section 1
<PAGE>
referring solely to additional shares of Series C Preferred Stock as may be
requested by the Holder as provided by Section 2 of the Senior Secured
Promissory Note issued in favor of the Holder).

     4.  The Agreement.

         This Warrant is subject to all other terms of the Agreement.

Dated:  March 30, 2001          HOUSTONSTREET EXCHANGE, INC.

(Corporate Seal)                By: /s/ Frank W. Getman Jr.
                                    -----------------------------------------
                                    Frank W. Getman Jr.
                                    Its President & Chief Executive Officer

Attest: /s/ Cynthia A. Johnson<PAGE>
                                                                   Exhibit 10.54

                          HOUSTONSTREET EXCHANGE, INC.

                              COMMON STOCK WARRANT

Exercisable and Expires in                       Right to Purchase 2,806,614
Accordance with the Agreement                    shares of Common Stock
                                                 (subject to adjustment)

No. W-001

                                    PREAMBLE

         HOUSTONSTREET EXCHANGE, INC. (the "Company"), a Delaware corporation,
hereby certifies that, for value received, BayCorp Holdings, Ltd. ("Holder") is
entitled, subject to the terms set forth below, to purchase from the Company
fully paid and nonassessable shares of Common Stock, $0.01 par value, of the
Company, at the purchase price per share (the "Purchase Price") of $2.50 (the
"Initial Purchase Price"). The number and character of such shares of Common
Stock and the Purchase Price are subject to adjustment as provided in Section 9
of the Agreement.

         This Warrant is one of the Common Stock Purchase Warrants (the
"Warrants"), evidencing the right to purchase shares of Common Stock of the
Company, issued pursuant to the Warrant Agreement dated as of even date herewith
among the Company and the other parties to the Agreement, a copy of which is on
file at the principal office of the Company. The Warrants evidence rights to
purchase an aggregate of 2,806,614 shares of Common Stock of the Company (the
"Shares"), subject to adjustment as provided in Section 9 of the Agreement.
Capitalized terms used herein but not defined herein shall have the meaning set
forth in the Common Stock Warrant Agreement of even date herewith (the
"Agreement").

     1.  Restricted Shares.

         The holder of this Certificate by its acceptance covenants and agrees
that this Warrant and the Shares are Restricted Shares in accordance with
Section 7 of the Agreement, and may only be transferred in accordance with that
section.

     2.  Exercise of Warrant.

         The holder of this Warrant may exercise it in accordance with
paragraphs 1 and 4 of the Agreement.

     3.  Purchase Price and Shares.

         The Purchase Price and number of Shares issuable hereunder may be
adjusted in accordance with Section 9 of the Agreement.
<PAGE>
     4.  The Agreement.

         This Warrant is subject to all other terms of the Agreement.

Dated:  March 30, 2001          HOUSTONSTREET EXCHANGE, INC.

(Corporate Seal)                By: /s/ Frank W. Getman Jr.
                                    ------------------------------------------
                                    Frank W. Getman Jr.
                                    Its President & Chief Executive Officer

Attest: /s/ Cynthia A. Johnson<PAGE>
                                                                   Exhibit 10.55

                          HOUSTONSTREET EXCHANGE, INC.

                              COMMON STOCK WARRANT

Exercisable and Expires in                   Right to Purchase 62,500
Accordance with the Agreement                shares of Common Stock
                                             (subject to adjustment)

No. W-006

                                    PREAMBLE

         HOUSTONSTREET EXCHANGE, INC. (the "Company"), a Delaware corporation,
hereby certifies that, for value received, James S. Gordon ("Holder") is
entitled, subject to the terms set forth below, to purchase from the Company
fully paid and nonassessable shares of Common Stock, $0.01 par value, of the
Company, at the purchase price per share (the "Purchase Price") of $2.50 (the
"Initial Purchase Price"). The number and character of such shares of Common
Stock and the Purchase Price are subject to adjustment as provided in Section 9
of the Agreement.

         This Warrant is one of the Common Stock Purchase Warrants (the
"Warrants"), evidencing the right to purchase shares of Common Stock of the
Company, issued pursuant to the Warrant Agreement dated as of even date herewith
among the Company and the other parties to the Agreement, a copy of which is on
file at the principal office of the Company. The Warrants evidence rights to
purchase an aggregate of 62,500 shares of Common Stock of the Company (the
"Shares"), subject to adjustment as provided in Section 9 of the Agreement.
Capitalized terms used herein but not defined herein shall have the meaning set
forth in the Common Stock Warrant Agreement of even date herewith (the
"Agreement").

     1.  Restricted Shares.

         The holder of this Certificate by its acceptance covenants and agrees
that this Warrant and the Shares are Restricted Shares in accordance with
Section 7 of the Agreement, and may only be transferred in accordance with that
section.

     2.  Exercise of Warrant.

         The holder of this Warrant may exercise it in accordance with
paragraphs 1 and 4 of the Agreement.

     3.  Purchase Price and Shares.

         The Purchase Price and number of Shares issuable hereunder may be
adjusted in accordance with Section 9 of the Agreement.
<PAGE>
     4.  The Agreement.

         This Warrant is subject to all other terms of the Agreement.

Dated: March 30, 2001                HOUSTONSTREET EXCHANGE, INC.

(Corporate Seal)                     By: /s/ Frank W. Getman Jr.
                                         ---------------------------------------
                                         Frank W. Getman Jr.
                                         Its President & Chief Executive Officer

Attest: /s/ Cynthia A. Johnson

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