If you've ever used a wiki, you know how useful (and fun) they can be. My first website was a wiki, and I've been sold on them ever since.

Well, now you can get a free wiki at PBwiki.com, with a choice of templates and everything. Their tagline is "PBwiki makes creating a wiki as easy as making a peanut butter sandwich", and as cheesy as that sounds, it's pretty close to the truth. You can be up and running in about 30 seconds.

That said, you should go check them out (take the tour). Even if you've never used a wiki before, try it, you'll probably like it.