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                                                                   Exhibit 10.13

As of August 24, 2006

Harbor Business Acquisition Corp.
200 Highpoint Drive, Suite 215
Chalfont, PA 18914-3922

H.C. Wainwright & Co., Inc.
52 Vanderbilt Avenue - 12th Floor
New York, NY  10017

RE:      INITIAL PUBLIC OFFERING

Gentlemen:

The undersigned stockholder, officer, director or senior advisor of Harbor
Business Acquisition Corp. ("Company"), in consideration of H.C. Wainwright &
Co., Inc. ("H.C. Wainwright") entering into a letter of intent ("Letter of
Intent") to underwrite an initial public offering of the securities of the
Company ("IPO") and embarking on the IPO process, hereby agrees as follows
(certain capitalized terms used herein are defined in paragraph 14 hereof):

1. If the Company solicits approval of its stockholders of a Business
Combination, the undersigned will cause Harbor Healthcare Holding LLC to vote
(i) all Insider Shares owned by it in accordance with the majority of the votes
cast by the holders of the IPO Shares, (ii) all of the shares that may be
acquired by it in the Private Placement, the IPO or in the aftermarket for the
Business Combination and (iii) all Insider Shares and all shares that may be
acquired by it in the Private Placement, the IPO or in the aftermarket for an
amendment to the Company's Certificate of Incorporation to provide for perpetual
existence of the Company in the event the Business Combination is approved.

2. In the event that the Company fails to consummate a Business Combination
within twenty-four-month period immediately following the date of the prospectus
related to the IPO (such date being referred to herein as the "Termination
Date"), the undersigned shall (i) cause the Trust Fund (as defined in the Letter
of Intent) to be liquidated and distributed to the holders of IPO Shares and
(ii) take all reasonable actions within his power to cause the Company to
liquidate as soon as reasonably practicable pursuant to the requirements of the
Delaware General Corporation Law. The undersigned hereby waives any and all
right, title, interest or claim of any kind ("Claim") in or to any liquidating
distributions by the Company, including, without limitation, any distribution of
the Trust Fund (as defined in the Letter of Intent), as a result of such
liquidation with respect to his Insider Shares and the Private Placement Shares
and hereby waives any Claim the undersigned may have in the future as a result
of, or arising out of, any contracts or agreements with the Company and will not
seek recourse against the Trust Fund for any reason whatsoever.

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Harbor Business Acquisition Corp.
H.C. Wainwright & Co., Inc.                               As of August 24, 2006

3. In order to minimize potential conflicts of interest which may arise from
multiple affiliations, the undersigned agrees to present to the Company for its
consideration, and not to any other person or entity unless the opportunity is
rejected by the Company, those opportunities to acquire an operating company the
undersigned reasonably believes are suitable opportunity for the Company, until
the earlier of the consummation by the Company of a Business Combination, the
dissolution and liquidation of the Company or until such time as the undersigned
ceases to be an officer or director of the Company, subject to any pre-existing
fiduciary obligations the undersigned might have.

4. The undersigned acknowledges and agrees that the Company will not consummate
any Business Combination which involves a company which is affiliated with any
of the Insiders unless the Company obtains an opinion from an independent
investment banking firm reasonably acceptable to H.C. Wainwright that the
business combination is fair to the Company's stockholders from a financial
perspective.

5. Except for monthly payments of $7,500 to be made to Harbor Business Group,
LLC for administrative payments neither the undersigned, any member of the
family of the undersigned, nor any affiliate of the undersigned ("Affiliate")
will be entitled to receive and will not accept any compensation for services
rendered to the Company prior to the consummation of the Business Combination;
provided that the undersigned shall be entitled to receive reimbursement from
the Company for his out-of-pocket expenses incurred in connection with seeking
and consummating a Business Combination.

6. Neither the undersigned, any member of the family of the undersigned, nor any
Affiliate of the undersigned will be entitled to receive or accept a finder's
fee or any other compensation in the event the undersigned, any member of the
family of the undersigned or any Affiliate of the undersigned originates a
Business Combination.

7. The undersigned will escrow his Insider Shares for the three-year period
commencing on the Effective Date subject to the terms of a Stock Escrow
Agreement which the Company will enter into with the undersigned and an escrow
agent acceptable to the Company.

8. The undersigned's biographical information furnished to the Company and H.C.
Wainwright and attached hereto as Exhibit A is true and accurate in all
respects, does not omit any material information with respect to the
undersigned's background and contains all of the information required to be
disclosed pursuant to Section 401 of Regulation S-K, promulgated under the
Securities Act of 1933. The undersigned's Questionnaire previously furnished to
the Company and H.C. Wainwright is true and accurate in all respects. The
undersigned represents and warrants that he:

                  (a) is not subject to or a respondent in any legal action for,
any injunction, cease-and-desist order or order or stipulation to desist or
refrain from any act or practice relating to the offering of securities in any
jurisdiction;

                                      -2-
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Harbor Business Acquisition Corp.
H.C. Wainwright & Co., Inc.                               As of August 24, 2006

                  (b) has never been convicted of or pleaded guilty to any crime
(i) involving any fraud or (ii) relating to any financial transaction or
handling of funds of another person, or (iii) pertaining to any dealings in any
securities and he is not currently a defendant in any such criminal proceeding;
and

                  (c) has never been suspended or expelled from membership in
any securities or commodities exchange or association or had a securities or
commodities license or registration denied, suspended or revoked.

9. The undersigned has full right and power, without violating any agreement by
which he is bound, to enter into this letter agreement.

10. The undersigned hereby waives his right and the rights of Harbor Healthcare
Holding LLC to exercise conversion rights with respect to any shares of the
Company's common stock owned or to be owned by the undersigned, directly or
indirectly, and agrees that he will not seek conversion with respect to such
shares in connection with any vote to approve a Business Combination.

11. Other than in connection with a Business Combination, the undersigned hereby
agrees to not propose, vote in favor of, and/or cause Harbor Healthcare Holding
LLC to vote in favor of an amendment to the Company's Certificate of
Incorporation to extend the Company's existence. Should such a proposal be put
before stockholders in connection with a Business Combination and other than
through actions by the undersigned, the undersigned hereby agrees to vote and/or
cause Harbor Healthcare Holding LLC to vote against such proposal. This
paragraph may not be modified or amended under any circumstances.

12. The undersigned agrees not to cause Harbor Healthcare Holding LLC to sell
any of its Insider Shares until the Company's completion of a Business
Combination.

13. The undersigned authorizes any employer, financial institution, or consumer
credit reporting agency to release to H.C. Wainwright and its legal
representatives or agents (including any investigative search firm retained by
H.C. Wainwright) any information they may have about the undersigned's
background and finances ("Information"). Neither H.C. Wainwright nor its agents
shall be violating the undersigned's right of privacy in any manner in
requesting and obtaining the Information and the undersigned hereby releases
them from liability for any damage whatsoever in that connection.

14. As used herein, (i) a "Business Combination" shall have the meaning set
forth in the form of Amended and Restated Certificate of Incorporation filed as
an exhibit to the registration statement filed in connection with the IPO; (ii)
"Insiders" shall mean all officers, directors and stockholders of the Company
immediately prior to the IPO; (iii) "Insider Shares" shall mean all of the
shares of Common Stock of the Company owned by an Insider prior to the IPO and
the Private Placement; (iv) "IPO Shares" shall mean the shares of Common Stock
issued in the Company's IPO; (v) "Private Placement Shares" shall mean the
shares of Common Stock underlying the 150,000 units issued in the Company's
private placement effected prior to the IPO; (vi) "Private Placement" shall mean
the Company's private placement effected prior to the IPO and (vii) "Convertible
Loans" shall mean the loans made by each of Harbor Healthcare Holding LLC and
Moreco Partners LLC in an aggregate amount of $800,000 ($920,000 if the
over-allotment option is exercised in full) as more fully described in the
prospectus for the IPO.

                                      -3-
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Harbor Business Acquisition Corp.
H.C. Wainwright & Co., Inc.                               As of August 24, 2006

15. This letter agreement shall be governed by and construed and enforced in
accordance with the laws of the State of New York, without giving effect to
conflicts of law principles that would result in the application of the
substantive laws of another jurisdiction. The undersigned hereby agrees that any
action, proceeding or claim against the undersigned arising out of or relating
in any way to this Agreement shall be brought and enforced in the courts of the
State of New York or the United States District Court for the Southern District
of New York, and irrevocably submits to such jurisdiction, which jurisdiction
shall be exclusive. The undersigned hereby waives any objection to such
exclusive jurisdiction and that such courts represent an inconvenience forum.

                                        By:  ________________________
                                             Walter P. Lomax, Jr., M.D.

                                      -4-
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Harbor Business Acquisition Corp.
H.C. Wainwright & Co., Inc.                               As of August 24, 2006

                                    EXHIBIT A

WALTER P. LOMAX, JR., M.D. has served as the Company's Senior Advisor since July
2006. Dr. Lomax served as the Executive Vice President of Health Affairs of
Americhoice Health Services, a health management company. From January 1996 to
present, Dr. Lomax served as the Chairman of The Lomax Companies, a private
investment firm that manages a portfolio of financial and other assets.
Dr. Lomax is the father of W. Thomas Lomax, the Company's Chief Executive
Officer and a member of its Board of Directors, and Bennett P. Lomax, the
Company's Secretary and a member of its Board of Directors. Dr. Lomax has a
medical license granted by the Commonwealth of Pennsylvania. Dr. Lomax received
a B.A. degree from LaSalle University and an M.D. degree from Hahnemann Medical
College.

                                      -5-<PAGE>

                                                                   Exhibit 10.14

As of August 24, 2006

Harbor Business Acquisition Corp.
200 Highpoint Drive, Suite 215
Chalfont, PA 18914-3922

H.C. Wainwright & Co., Inc.
52 Vanderbilt Avenue - 12th Floor
New York, NY  10017

RE:      INITIAL PUBLIC OFFERING

Gentlemen:

The undersigned security holder of Harbor Business Acquisition Corp.
("Company"), in consideration of H.C. Wainwright & Co., Inc. ("H.C. Wainwright")
entering into a letter of intent ("Letter of Intent") to underwrite an initial
public offering of the securities of the Company ("IPO") and embarking on the
IPO process, hereby agrees as follows (certain capitalized terms used herein are
defined in paragraph 13 hereof):

1. If the Company solicits approval of its stockholders of a Business
Combination, the undersigned will vote (i) all Insider Shares owned by it in
accordance with the majority of the votes cast by the holders of the IPO Shares,
(ii) all of the shares that may be acquired by it in the Private Placement, the
IPO or in the aftermarket for the Business Combination and (iii) all Insider
Shares and all shares that may be acquired by it in the Private Placement, the
IPO or in the aftermarket for an amendment to the Company's Certificate of
Incorporation to provide for perpetual existence of the Company in the event the
Business Combination is approved.

2. In the event that the Company fails to consummate a Business Combination
within twenty-four-month period immediately following the date of the prospectus
related to the IPO (such date being referred to herein as the "Termination
Date"), the undersigned shall (i) cause the Trust Fund (as defined in the Letter
of Intent) to be liquidated and distributed to the holders of IPO Shares and
(ii) take all reasonable actions within its power to cause the Company to
liquidate as soon as reasonably practicable pursuant to the requirements of the
Delaware General Corporation Law. The undersigned hereby waives any and all
right, title, interest or claim of any kind ("Claim") in or to any liquidating
distributions by the Company, including, without limitation, any distribution of
the Trust Fund (as defined in the Letter of Intent), as a result of such
liquidation with respect to its Insider Shares and the Private Placement Shares
and hereby waives any Claim the undersigned may have in the future as a result
of, or arising out of, any contracts or agreements with the Company and will not
seek recourse against the Trust Fund for any reason whatsoever.

<PAGE>

Harbor Business Acquisition Corp.
H.C. Wainwright & Co., Inc.                               As of August 24, 2006

3. [The undersigned acknowledges and agrees that the Company will not vote in
favor of consummation of any Business Combination which involves a company which
is affiliated with any of the Insiders unless the Company obtains an opinion
from an independent investment banking firm reasonably acceptable to H.C.
Wainwright that the Business Combination is fair to the Company's stockholders
from a financial perspective].

4. Except for monthly payments of $7,500 to be made to Harbor Business Group,
LLC for administrative payments neither the undersigned nor any affiliate of the
undersigned ("Affiliate") will be entitled to receive and will not accept any
compensation for services rendered to the Company prior to the consummation of
the Business Combination.

5. Neither the undersigned nor any Affiliate of the undersigned will be entitled
to receive or accept a finder's fee or any other compensation in the event the
undersigned or any Affiliate of the undersigned originates a Business
Combination.

6. The undersigned will escrow its Insider Shares for the three-year period
commencing on the Effective Date subject to the terms of a Stock Escrow
Agreement which the Company will enter into with the undersigned and an escrow
agent acceptable to the Company.

7. The undersigned represents and warrants that it:

                  (a) is not subject to or a respondent in any legal action for,
any injunction, cease-and-desist order or order or stipulation to desist or
refrain from any act or practice relating to the offering of securities in any
jurisdiction;
                  (b) has never been convicted of or pleaded guilty to any crime
(i) involving any fraud or (ii) relating to any financial transaction or
handling of funds of another person, or (iii) pertaining to any dealings in any
securities and he is not currently a defendant in any such criminal proceeding;
and

                  (c) has never been suspended or expelled from membership in
any securities or commodities exchange or association or had a securities or
commodities license or registration denied, suspended or revoked.

8. The undersigned has full right and power, without violating any agreement by
which it is bound, to enter into this letter agreement and to be a security
holder of the Company.

9. The undersigned hereby waives its right to exercise conversion rights with
respect to any shares of the Company's common stock owned or to be owned by the
undersigned, directly or indirectly, and agrees that it will not seek conversion
with respect to such shares in connection with any vote to approve a Business
Combination.

10. Other than in connection with a Business Combination, the undersigned hereby
agrees to not to vote in favor of an amendment to the Company's Certificate of
Incorporation to extend the Company's existence. Should such a proposal be put
before stockholders in connection with a Business Combination, the undersigned
hereby agrees to vote against such proposal. This paragraph may not be modified
or amended under any circumstances.

                                      -2-
<PAGE>

Harbor Business Acquisition Corp.
H.C. Wainwright & Co., Inc.                               As of August 24, 2006

11. The undersigned agrees not to sell any of its Insider Shares until the
Company's completion of a Business Combination.

12. The undersigned authorizes any financial institution or credit reporting
agency to release to H.C. Wainwright and its legal representatives or agents
(including any investigative search firm retained by H.C. Wainwright) any
information they may have about the undersigned's background and finances
("Information"). Neither H.C. Wainwright nor its agents shall be violating the
undersigned's right of privacy in any manner in requesting and obtaining the
Information and the undersigned hereby releases them from liability for any
damage whatsoever in that connection.

13. As used herein, (i) a "Business Combination" shall have the meaning set
forth in the form of Amended and Restated Certificate of Incorporation filed as
an exhibit to the registration statement filed in connection with the IPO; (ii)
"Insiders" shall mean all officers, directors and stockholders of the Company
immediately prior to the IPO; (iii) "Insider Shares" shall mean all of the
shares of Common Stock of the Company owned by an Insider prior to the IPO and
the Private Placement; (iv) "IPO Shares" shall mean the shares of Common Stock
issued in the Company's IPO; (v) "Private Placement Shares" shall mean the
shares of Common Stock underlying the 150,000 units issued in the Company's
private placement effected prior to the IPO; (vi) "Private Placement" shall mean
the Company's private placement effected prior to the IPO and (vii) "Convertible
Loans" shall mean the loans made by each of Harbor Healthcare Holding LLC and
Moreco Partners LLC in an aggregate amount of $800,000 ($920,000 if the
over-allotment option is exercised in full) as more fully described in the
prospectus for the IPO.

14. This letter agreement shall be governed by and construed and enforced in
accordance with the laws of the State of New York, without giving effect to
conflicts of law principles that would result in the application of the
substantive laws of another jurisdiction. The undersigned hereby agrees that any
action, proceeding or claim against the undersigned arising out of or relating
in any way to this Agreement shall be brought and enforced in the courts of the
State of New York or the United States District Court for the Southern District
of New York, and irrevocably submits to such jurisdiction, which jurisdiction
shall be exclusive. The undersigned hereby waives any objection to such
exclusive jurisdiction and that such courts represent an inconvenience forum.

                                   HARBOR HEALTHCARE HOLDING LLC

                                   By:  ______________________________
                                        Name:
                                        Title:

                                      -3-

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