Foo Camp is a weekend gathering of Friends of O'Reilly who are doing interesting work in all manner of emerging technologies, held at the O'Reilly campus in Sebastopol, CA. Foo Camp is a creation of the people who attend, and it's as good as participants make it. Be prepared to lead or participate in a session, ask interesting questions, show off what you're working on, and generally leave your mark on the weekend. Visit the Foo Camp Wiki for more info.