A WikiWikiWeb is a site where everyone can collaborate on the content. The most well-known and widely used Wiki is the Portland Pattern Repository at http://c2.com/cgi-bin/wiki?WikiWikiWeb. (*)
I found these statements there particularly relevant:
The point is to make the Edit Text form simple and the Find Page search fast.
In addition to being quick, this site also aspires to Zen ideals generally labeled Wabi Sabi. Zen finds beauty in the imperfect and ephemeral. When it comes down to it, that's all you need.
You can say hello on Recent Visitors, or read about How To Use Wiki and Adding Pages. Go ahead, join the discussion, play with it, and have fun!
(*) Well, this is probably an old statement now: I guess the most famous wiki is currently the Wikipedia at http://www.wikipedia.org. J.V.