If we're starting up a new wiki (as opposed to rescuing FOTpedia), it's probably best to sort out how it's going to be organised before getting it started. I don't know if it's best doing that here or sorting out a time to meet in the chat (maybe use Google Wave?).
As I said earlier, I have no experience with wikis so it's probably best if someone else gets it up and running. I can help out with the styling/css if needed but I'd have no idea where to start with installing it, etc.