Hello,
Recently I found it
http://www.youtube.com/watch?v=rj4V2BcA40U
It contains some scenes from Wikimania 2006.
http://www.youtube.com/results?search_query=wikimania
is taken over by Larry Lessig btw ...
Are those are all movies about Wikimania?
Anyway, have fun!
For Wikimania 2007 we should better use a trustful organization to
archive the videos: