I'm at the Wikimania conference at Harvard today. Jimbo Wales just announced that Wikipedia is to be included as the first major application for the $100 laptop.
I recently put a wiki up on Rocketboom and it is starting to take off. We use it for FAQ, the audience is using it to keep track of episode info, we are trying out examples of backdrops on another article, it's really amazing how applicable it is.
It's mostly amazing how it just goes on its own.
Wikiversity and Wikiwyg were also announced today, great progress.