ITEM 7.01. REGULATION FD DISCLOSURE.

S1 Corporation has posted investor presentation materials dated May 2008 on its website, www.s1.com, under the heading "Investor Relations" to be used in connection with meetings with investors that management expects to have from time to time. A copy of the presentation materials is also attached hereto as Exhibit 99.1.
Exhibit 99.1 is a copy of presentation materials to be used in connection with investor presentations. This information is being furnished pursuant to Item 7.01 of this Current Report on Form 8-K, and the information contained in Exhibit 99.1 shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities under Section 18.

ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS.

(a) Not applicable.
(b) Not applicable.
(c) Not applicable.
(d) Exhibits.

Exhibit No. Description

99.1 Investor Presentation dated May 2008

---