Form SB-2 was used by small business issuers to register securities to be sold for cash. This form has been discontinued by the SEC, along with Form SB-1. Now, most companies who used SB-1 file their securities offerings on Form S-1.
For more information from the SEC about the new form requirements, see their report, "Changeover to the SEC’s New Smaller Reporting Company System by Small Business Issuers and Non-Accelerated Filer Companies: A Small Entity Compliance Guide," or visit the SEC website (http://www.sec.gov/).