Here's the Wikipedia entry on celebrity sex tapes. You'll find a comprehensive list of all the stars who've filmed their naughties for the—sorry—a camera. There's also a list of fake sex tapes—we're so glad the whole Miss West Virgina controversy of 2003 is all cleared up. We didn't think it was her, but it's nice to know for sure.
Conceptual visual: a still of the Tonya Harding/Jeff Gillooly tape after we couldn't find anything from the Guttenberg one.