Trac!

Slightly old news, but I neglected to mention it here. Since sourceforge has decided to include Trac among their offering of hosted-apps, we've switched away from MediaWiki (which is great, but a bit overkill for this operation) and gained not only a decent wiki, but a superbly integrated bug tracker, version control visualizer, project manager and task organizer. Go check it out under the Hosted Apps tab, or just click on Summary -> Website.