EXHIBIT 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of Siena Technologies, Inc., a Nevada corporation (the “Company”), does hereby certify, to such officer’s knowledge, that:

• the quarterly report for the quarter ended September 30, 2006 (the “Form 10-QSB”) of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and

• the information contained in the Form 10-QSB fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Jeffrey R. Hultman  

Jeffrey R. Hultman 

Chief Executive Officer
Date: November 14, 2006  

/s/ Christopher G. Pizzo  

Christopher G. Pizzo 

Chief Financial Officer
Date: November 14, 2006