I’m posting here in case not everyone knows about it: Kerkerkruip has a wiki! The wiki is designed to have detailed information that will answer all your little questions about how elements of the game work and how to make the most strategic use of them.
Specific recommendations? I have a small wiki on Wikispaces (which isn’t just for teachers, despite what the front page look like), and they’ve been nothing but helpful.
But I don’t want to sound like a shill: you can find hundreds of possibilities with google.
I’ve used wikidot.com with great success. Very unobtrusive ads (unlike wikia’s which are ALL Flash and crash the Flash plugin constantly) and reasonable rates/size limits.