Stopped by Office 2.0 today.
Whereas Barcamp is a face-to-face wiki, Office 2.0 is a face-to-face blog.
That is, it started as a blog that expanded into a conference. Four launches happened today, if you include the Google Docs timing. But mostly it is a cacophony of upstarts, lots of parroting of things others said years ago. And behind all the noise some good relationships.