Blogs and Wikis for gaming
plasticbag.org talks of Wikis.
I've wondered about the pros and cons of Wikis or Moveable Type for maintaining gameworld information. A few weeks ago I spent quite a bit of time cutting and pasting a lot of the static World of Kalyr pages into the Kalyr Wiki hosted by The Phoenyx. Wikis let you have very rich hypertext cross-referencing, using the WikiWords.
On the other hand, Moveable Type is very powerful for maintaining indexes and categories, something Wiki's won't do for you automatically. It's very good for something like game logs that are essentially date-based. But you don't get rich hyperlinking unless you code all the links in manually.