This monograph was produced as part of the Marketing HIV Prevention project, a collaborative project between the Center for AIDS Prevention Studies at the University of California, San Francisco (Thomas J. Coates, , Director) and the Harvard AIDS Institute (Richard Marlink, MD, Executive Director). We would like to thank SmithKline Beecham Consumer Health Care, makers of OraSure, for its unrestricted grant in support of the Marketing HIV Prevention project. We would also like to acknowledge the support of the Office of AIDS, National Institute of Mental Health, National Institutes of Health, for its ongoing support of the Center for AIDS Prevention Studies under grant number MH42459. The author would like to thank Thomas Coates and Mario Cooper for their significant contributions to this report. I am also indebted to several colleagues who reviewed earlier drafts of the paper, including: Paula Brewer, James Colgrove, Peggy Dolcini, Kevin Filocamo, Katherine Haynes-Sanstad, Lisa Heft, Susan Kegeles, Clark Moore, Ric Marlink, Maureen Michaels, James Riggs, Mark Steitz, Jeff Stryker, and Steve Wakefield. And thanks to Susan Lausten for the design and layout of this piece.