A documentary about wikipedia will air in a few months on PBS.
A rough cut is available (the download link is in the left column) -- it's pretty good, but aimed at a mainstream audience, so mostly familiar. The stuff that isn't (cultural differences between wikipedias of different languages, for example) is the most interesting.

The raw footage is here. I'll see if I can go through it over the next week or so and ferret out the coolness. (Meta:Wikimentary)