Ze Frank rose to Internet fame with his viral video How to Dance Properly, and has been a purveyor of imaginative online comedy ever since. His latest experiment, the show, is posted daily at zefrank.com. In this performance, drawn from the TED2004 archive, he offers the signature blend of comedy, technology and social theory that made him our favorite philosopher comic. (Recorded February 2004 in Monterey, CA. Duration: 19:42)

Musician and activist Peter Gabriel explains the personal motivation behind his work with human-rights watchdog Witness. He shares stories of everyday people using video cameras to expose human rights abuses around the world, and poses the question: if

Why do people succeed? Because they're smart? Or lucky? How about: Neither. Richard St. John compacts seven years of research on successful people into an unmissable 3-minute slideshow on the real secrets of success (Hint: passion, persistence, and pushy mothers help). Richard St. John is author of Stupid, Ugly, Unlucky and RICH: What really leads to success -- and it's not smarts, looks, or luck. He's also founder of the communications agency, The St John Group. (Recorded February 2005 in Monterey, CA. Duration: 3:40)

Jimmy Wales is founder of Wikipedia, the self-organizing, self-correcting, ever-expanding, and thoroughly addictive encyclopedia of the future. In this presentation, he explains how Wikipedia&ampapos;s collaborative systems work, and why they succeed.