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Exhibit 10.15    
    


MDC ACQUISITION PARTNERS INC.

STOCK PURCHASE AGREEMENT  


        THIS COMMON STOCK PURCHASE AGREEMENT (the "Agreement") is made as
of June 21, 2005, by and between MDC ACQUISITION PARTNERS INC., a Delaware corporation (the
"Company") and MDC ASSET MANAGEMENT PARTNERS, LLC
("Purchaser"). 


        The
Company desires to issue, and Purchaser desires to acquire, stock of the Company as herein described, on the terms and conditions hereinafter set forth; 



        1.    Purchase and Sale of Stock.    Purchaser hereby agrees to purchase from the Company, and the Company hereby
agrees to sell to Purchaser, an aggregate of 218,750 shares of the Common Stock of the Company (the "Stock") at $0.01 per share, for an aggregate
purchase price of $2,187.50, payable in cash. The closing hereunder, including payment for and delivery of the Stock shall occur at the offices of the Company immediately following the execution of
this Agreement, or at such other time and place as the parties may mutually agree. 


        2.    Limitations on Transfer.    Purchaser shall not assign, hypothecate, donate, encumber or otherwise dispose of
any interest in the Stock except in compliance with the provisions herein and applicable securities laws. Furthermore, the Stock shall be subject to any right of first refusal in favor of the Company
or its assignees that may be contained in the Company's Bylaws. The Company shall not be required (a) to transfer on its books any shares of Stock of the Company which shall have been
transferred in violation of any of the provisions set forth in this Agreement or (b) to treat as owner of such shares or to accord the right to vote as such owner or to pay dividends to any
transferee to whom such shares shall have been so transferred. Purchaser hereby further acknowledges that Purchaser may be required to hold the Stock purchased hereunder
indefinitely. During the period of time during which the Purchaser holds the Stock, the value of the Stock may increase or decrease, and any risk associated with such Stock and such fluctuation in
value shall be borne by the Purchaser.


        3.    Restrictive Legends.    All certificates representing the Stock shall have endorsed thereon legends in
substantially the following forms (in addition to any other legend which may be required by other agreements between the parties hereto): 



        (a)    "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AS AMENDED. THEY MAY NOT BE
SOLD, OFFERED
FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THE SECURITIES UNDER SAID ACT OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION
IS NOT REQUIRED." 


         (b)    Any legend required by appropriate blue sky officials. 




        4.    Investment Representations.    In connection with the purchase of the Stock, Purchaser represents to the Company
the following: 



         (a)    Purchaser is aware of the Company's business affairs and financial condition and has acquired sufficient information about the
Company to reach
an informed and knowledgeable decision to acquire the Stock. Purchaser is purchasing the Stock for investment for Purchaser's own account only and not with a view to, or for resale in connection with,
any "distribution" thereof within the meaning of the Act. 



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         (b)    Purchaser understands that the Stock has not been registered under the Act by reason of a specific exemption therefrom, which
exemption depends
upon, among other things, the bona fide nature of Purchaser's investment intent as expressed herein. 



        (c)    Purchaser further acknowledges and understands that the Stock must be held indefinitely unless the Stock is subsequently registered
under the Act
or an exemption from such registration is available. Purchaser understands that the certificate evidencing the Stock will be imprinted with a legend which
prohibits the transfer of the Stock unless the Stock is registered or such registration is not required in the opinion of counsel for the Company. 


         (d)    Purchaser is familiar with the provisions of Rules 144, under the Act, as in effect from time to time, which, in substance,
permits
limited public resale of "restricted securities" acquired, directly or indirectly, from the issuer thereof (or from an affiliate of such issuer), in a non-public offering subject to the
satisfaction of certain conditions. 




        The
Stock may be resold by Purchaser in certain limited circumstances subject to the provisions of Rule 144, which requires, among other things: (i) the availability of
certain public information about the Company and (ii) the resale occurring following the required holding period under Rule 144 after the Purchaser has purchased, and made full payment
of (within the meaning of Rule 144), the securities to be sold. 



        (e)    Purchaser further understands that at the time Purchaser wishes to sell the Stock there may be no public market upon which to make
such a sale,
and that, even if such a public market then exists, the Company may not be satisfying the current public information requirements of Rule 144, and that, in such event, Purchaser would be
precluded from selling the Stock under Rule 144 even if the minimum holding period requirement had been satisfied. 


         (f)    Purchaser warrants and represents that Purchaser is an "accredited investor" as that term is defined in Rule 501 of
Regulation D
promulgated by the Securities and Exchange Commission under the Act. 


         (g)    Purchaser further warrants and represents that Purchaser has either (i) preexisting personal or business relationships, with
the Company
or any of its officers, directors or controlling persons, or (ii) the capacity to protect his own interests in connection with the purchase of the Stock by virtue of the business or financial
expertise of himself or of professional advisors to Purchaser who are unaffiliated with and who are not compensated by the Company or any of its affiliates, directly or indirectly. 




        5.    Market Stand-Off Agreement.    Purchaser shall not sell, dispose of, transfer, make any short sale
of, grant any option for the purchase of, or enter into any hedging or similar transaction with the same economic effect as a sale, any Common Stock or other securities of the Company held by
Purchaser, including the Stock (the "Restricted Securities"), during the 180-day period following the effective date of a registration statement of the Company filed under the Act (the
"Lock Up Period"); (or such longer period, not to exceed 18 days after the expiration of the 180-day period, as the underwriters or the Company shall request in order to facilitate
compliance with NASD Rule 2711). Purchaser agrees to execute and deliver such other agreements as may be reasonably requested by the Company and/or the managing underwriter(s) which are
consistent with the foregoing or which are necessary to give further effect thereto. In order to enforce the foregoing covenant, the Company may impose stop-transfer instructions with
respect to Purchaser's Restricted Securities until the end of such period. The underwriters of the Company's stock are intended third party beneficiaries of this Section 5 and shall have the
right, power and authority to enforce the provisions hereof as though they were a party hereto. 


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        6.    Miscellaneous.    



        (a)    Notices.    All notices required or permitted hereunder shall be in writing and shall be deemed effectively
given: (i) upon personal delivery to the party to be notified, (ii) when sent by confirmed telex or facsimile if sent during normal business hours of the recipient, and if not during
normal business hours of the recipient, then on the next business day, (iii) five (5) calendar days after having been sent by registered or certified mail, return receipt requested,
postage prepaid, or (iv) one (1) business day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt. All
communications shall be sent to the other party hereto at such party's address hereinafter set forth on the signature page hereof, or at such other address as such party may designate by ten
(10) days advance written notice to the other party hereto. 


        (b)    Successors and Assigns.    This Agreement shall inure to the benefit of the successors and assigns of the
Company and, subject to the restrictions on transfer herein set forth, be binding upon Purchaser, Purchaser's successors, and assigns. 


        (c)    Governing Law; Venue.    This Agreement shall be governed by and construed in accordance with the laws of the
State of California. The parties agree that any action brought by either party to interpret or enforce any provision of this Agreement shall be brought in, and each party agrees to, and does hereby,
submit to the jurisdiction and venue of, the appropriate state or federal court for the district encompassing the Company's principal place of business. 


        (d)    Further Execution.    The parties agree to take all such further action(s) as may reasonably be necessary to
carry out and consummate this Agreement as soon as practicable, and to take whatever
steps may be necessary to obtain any governmental approval in connection with or otherwise qualify the issuance of the securities that are the subject of this Agreement. 



        (e)    Entire Agreement; Amendment.    This Agreement constitutes the entire agreement between the parties with
respect to the subject matter hereof and supersedes and merges all prior agreements or understandings, whether written or oral. This Agreement may not be amended, modified or revoked, in whole or in
part, except by an agreement in writing signed by each of the parties hereto. 


        (f)    Independent Counsel.    Purchaser acknowledges that this Agreement has been prepared on behalf of the Company
by Cooley Godward llp, counsel to the Company and that Cooley Godward llp does not represent, and is not acting on behalf of, Purchaser. Purchaser has been provided with an opportunity to consult with
Purchaser's own counsel with respect to this Agreement. 


        (g)    Severability.    If one or more provisions of this Agreement are held to be unenforceable under applicable law,
the parties agree to renegotiate such provision in good faith. In the event that the parties cannot reach a mutually agreeable and enforceable replacement for such provision, then (i) such
provision shall be excluded from this Agreement, (ii) the balance of the Agreement shall be interpreted as if such provision were so excluded and (iii) the balance of the Agreement shall
be enforceable in accordance with its terms. 


        (h)    Counterparts.    This Agreement may be executed in two or more counterparts, each of which shall be deemed an
original and all of which together shall constitute one instrument. 


        (i)    CIRCULAR 230 DISCLAIMER.    THE TAX LAW IS VERY COMPLEX. THIS AGREEMENT CONTAINS
STATEMENTS REGARDING GENERAL TAX PRINCIPLES THAT MAY NOT BE SPECIFIC TO YOUR TAX SITUATION. THIS ADVICE WAS NOT INTENDED OR WRITTEN TO BE USED BY YOU FOR THE PURPOSE OF AVOIDING TAX PENALTIES THAT
MIGHT BE IMPOSED ON YOU. YOU SHOULD SEEK ADVICE BASED ON YOUR OWN  



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 PARTICULAR CIRCUMSTANCES FROM YOUR INDEPENDENT TAX ADVISOR. THIS DISCLAIMER IS REQUIRED BY THE INTERNAL REVENUE SERVICE'S CIRCULAR 230.




        In Witness Whereof, the parties hereto have executed this Agreement as of the day and year first above written. 



	 	 	MDC ACQUISITION PARTNERS INC.
	

 	
 	

By:	
 	

/s/ Matthew P. Carbone
MATTHEW P. CARBONE, PRESIDENT
	



 	

 	



Address: 525 Middlefield Rd., Suite 210

Menlo Park, CA 94025
	

 	
 	
MDC ASSET MANAGEMENT PARTNERS, LLC 
	



 	

 	



By:	

 	



/s/ Robert B. Hellman, Jr.
ROBERT B. HELLMAN, JR., SOLE MEMBER
	



 	

 	



Address: 525 Middlefield Rd., Suite 210

Menlo Park, CA 94025




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Exhibit 10.15