(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

(Date of Event Which Requires Filing of this Statement)

This statement relates to shares of Common Stock (the "Stock") of eSpeed, Inc. (the "Issuer"). The principal executive office of the Issuer is located at 110 E. 59th St., New York, NY 10022.

The persons filing this statement and the persons enumerated in Instruction C of Schedule 13D and, where applicable, their respective places of organization, general partners, directors, executive officers and controlling persons, and the information regarding them, are as follows:

The source and amount of funds used in purchasing the Stock were as follows:

On April 18, 2007, the Filers issued a press release regarding the Issuer. The press release is filed as Exhibit A hereto and is incorporated herein by reference.

The Filers have been and may continue to be in contact with the Issuer's management, members of the Issuer's Board of Directors, other significant shareholders, potential transaction partners and others regarding alternatives to maximize shareholder value.

None of the Filers has any present plans or intentions to acquire or dispose of any securities of the Issuer other than on behalf of advisory clients of the Filers for the purpose of investment. Other than as described herein, none of the Filers has any present plans or proposals which relate to, or would result in, any of the transactions or events described in Item 4 of Schedule 13D.

The Filers may decide to purchase at any time or times on behalf of its advisory clients additional shares of Stock or other securities of the Issuer. Each of them also may at any time or times cause its advisory clients to dispose of any or all securities of the Issuer in any lawful manner. Their advisory clients reserve all of their rights as stockholders of the Issuer and may exercise those rights in any manner that they consider to be in the interests of such clients.

The beneficial ownership of the Stock by each Filer at the date hereof is reflected on that Filer's cover page.

The Filers effected the following transactions in the Stock in open market transactions on the dates indicated, and such transactions are the only transactions in the Stock by the Filers since March 16, 2007:

* Convertible into the right to acquire 100 shares of Class A Common Stock.

WC LLC is the general partner of its investment limited partnership clients or the investment adviser to its separate account clients pursuant to agreements of limited partnership or investment advisory agreements providing to WC LLC the authority, among other things, to invest the funds of such clients in Stock, to vote and dispose of Stock and to file this statement on behalf of such clients. Pursuant to such limited partnership agreements or investment advisory agreements, WC LLC is entitled to allocations or fees based on assets under management and realized and unrealized gains.

Exhibit A. Press Release, dated April 18, 2007.

Exhibit B. Agreement Regarding Joint Filing of Statement on Schedule 13D or 13G.

SIGNATURES

After reasonable inquiry and to the best of my knowledge, I certify that the information set forth in this statement is true, complete and correct.

Dated: April 18, 2007

EXHIBIT A

[LETTERHEAD OF WC CAPITAL MANAGEMENT LLC]

WC Capital Comments on Tullet Prebon eSpeed Bid

Encourages Cantor to Make a Competitive Bid

April 18, 2007

Greenbrae, CA.WC Capital Management, LLC, an investment adviser to clients that are substantial holders of eSpeed Class A common stock as disclosed in WC Capital's 13D filings of March 29, 2007, and April 18, 2007, calls for an independent evaluation of the Tullet Prebon bid of $12 for all eSpeed Class A shares.

Specifically, the $12 per share offered is a significant premium to recent trading of eSpeed shares and is beneficial to all Class A shareholders. Aaron H. Braun, the manager of WC Capital commented, "We view the Tullet Prebon bid as extremely attractive and deserves to be considered by the independent directors of eSpeed. Should Cantor Fitzgerald L.P. decide to match this or any potential future offer, we would welcome that development." Additionally, WC Capital requests that eSpeed hire an investment banker to evaluate the Tullet Prebon bid and any future proposals.

Commenting further Braun stated, "The Tullet Prebon bid of $12 is at the low end of our valuation range of $12 to $16 per Class A share we highlighted in our letter to Mr. Lutnick, chairman of eSpeed, on March 28, 2007, and thus is acceptable to us. Should other parties, including Cantor, make competitive offers, we would evaluate those at the appropriate time."

WC Capital Management, LLC is a small and micro-cap investor, specializing in special situations, technology, healthcare, and consumer companies.

###

EXHIBIT B

AGREEMENT REGARDING JOINT FILING

OF STATEMENT ON SCHEDULE 13D OR 13G

The undersigned agree to file jointly with the Securities and Exchange Commission (the "SEC") any and all statements on Schedule 13D or Schedule 13G (and any amendments or supplements thereto) required under section 13(d) of the Securities Exchange Act of 1934, as amended, in connection with purchases by the undersigned of the Class A Common Stock of eSpeed, Inc. For that purpose, the undersigned hereby constitute and appoint WC Capital Management, LLC, a California limited liability company, as their true and lawful agent and attorney-in-fact, with full power and authority for and on behalf of the undersigned to prepare or cause to be prepared, sign, file with the SEC and furnish to any other person all certificates, instruments, agreements and documents necessary to comply with section 13(d) and section 16(a) of the Securities Exchange Act of 1934, as amended, in connection with said purchases, and to do and perform every act necessary and proper to be done incident to the exercise of the foregoing power, as fully as the undersigned might or could do if personally present.

Dated: April 18, 2007