Austin-based SailPoint, which develops identity management software, has added Bill Bock to its board, the firm announced this morning. Bill Bock is the former CFO of Silicon Labs, and also has served at CenterPoint Ventures, Verity Ventures, DAZEL Corporation, Tivoli Systems, and Convex Computer Corporation. Bock was COO at Tivoli when it went IPO in 1995, and was CFO at Convex at its own IPO.