So much to read on Wikis

There are many, many interesting pages out there about wikis.

For history, there's the original WikiWikiWeb, started in 1995. There's Wikipedia, (can it be called the currently most popular or successful wiki?) and their entry on wikis.

MeatballWiki is a meta-wiki for "a community of active practicioners striving to teach each other how to organize people using online tools." It has neat discussion of social challenges like ForestFires, BarnRaising, and DocumentMode vs. ThreadMode.

Weblogg-ed discusses "The Read/Write Web in the Classroom", often including wikis. I'm really interested in wikis in the classroom... including the failures.