www.barcamp.org

http://en.wikipedia.org/wiki/Barcamp"> http://en.wikipedia.org/wiki/Barcamp

Defn from Wikipedia;

BarCamp is an international network of unconferences — open, participatory workshop-events, whose content is provided by participants — focusing on early-stage web applications, and related open source technologies and social protocols. The name is a playful allusion to its origins, with reference to the hacker slang term, foobar: BarCamp arose as a spin-off and response to Foo Camp, an annual invitation-only unconference hosted by open source publishing luminary, Tim O'Reilly.