<PAGE>

EXHIBIT 10.75

                              IBIZ TECHNOLOGY CORP.
                           2238 WEST LONE CACTUS DRIVE
                             PHOENIX, ARIZONA 85027


                                 April 29, 2003


AJW Partners, LLC
AJW Offshore, Ltd.
AJW Qualified Partners, LLC
1044 Northern Boulevard
Suite 302
Roslyn, New York 11576


              Re:     IBIZ TECHNOLOGY CORP. ("COMPANY") -
                      AMENDMENT OF DEBENTURES
                      -----------------------

Ladies and Gentlemen:

         This letter sets forth the agreement of the parties hereto to amend the
calculation of the conversion price of certain debentures which are convertible
into shares of the Company's common stock, par value $.001 per share (the
"Common Stock"), originally issued by the Company to the investors listed in the
signature pages hereto (collectively, the "Investors") on January 31, 2003 and
March 20, 2003 (collectively, the "Debentures").

         By execution hereof, for good and valuable consideration the receipt
and sufficiency of is hereby acknowledged, the parties hereto agree that:

         1.   The definition of "Trading Price" in Section 1.2 of the Debentures
              shall hereby be amended as follows:

                  "TRADING PRICE" means, for any security as of any date, the
                  intraday trading price on the "pink sheets" or the
                  Over-the-Counter Bulletin Board (the "OTCBB") as reported by a
                  reliable reporting service mutually acceptable to and
                  hereafter designated by Holders of a majority in interest of
                  the Debentures and the Borrower or, if the "pink sheets" or
                  the OTCBB is not the principal trading market for such
                  security, the intraday trading price of such security on the
                  principal securities exchange or trading market where such
                  security is listed or traded or, if no intraday trading price
                  of such security is available in any of the foregoing manners,
                  the average of the intraday trading prices of any market
                  makers for such security that are listed in the "pink sheets"
                  by the National Quotation Bureau, Inc. If the Trading Price
                  cannot be calculated for such security on such date in the
                  manner provided above, the Trading Price shall be the fair
                  market value as reasonably determined in good faith by (a) the
                  Board of Directors of the Company or, at the option of a
                  majority-in-interest of the Debentures by (b) an independent
                  investment bank of nationally recognized standing in the
                  valuation of businesses similar to the business of the
                  Company.


<PAGE>

2. All other provisions of the Debentures shall remain in full force and effect.

         The parties shall do and perform, or cause to be done and performed,
all such further acts and things, and shall execute and deliver all such other
agreements, certificates, instruments and documents, as the other parties hereto
may reasonably request in order to carry out the intent and accomplish the
purposes of this letter agreement, including without limitation the issuance of
amended Debentures.











                            [Signature Page Follows]






<PAGE>


         Please signify your agreement with the foregoing by signing a copy of
this letter where indicated and returning it to the undersigned.


                                           Sincerely,

                                           IBIZ TECHNOLOGY CORP.


                                           /s/ Kenneth W. Schilling
                                           -------------------------------------
                                           Kenneth W. Schilling
                                           President and Chief Executive Officer
ACCEPTED AND AGREED:

AJW PARTNERS, LLC
By:  SMS GROUP, LLC


/s/ Corey S. Ribotsky
------------------------------------
Corey S. Ribotsky, Manager


AJW OFFSHORE, LTD.
By: FIRST STREET MANAGER II, LLC


/s/ Corey S. Ribotsky
------------------------------------
Corey S. Ribotsky, Manager


AJW QUALIFIED PARTNERS, LLC
By: AJW MANAGER, LLC


/s/ Corey S. Ribotsky
------------------------------------
Corey S. Ribotsky, Manager