There have been two other unofficial attempts I've found circling around free wiki builders too.
Now that you say it, I remember Killer2's (which wasn't really a wiki anyway). What's the last one?
what about a scripting wiki with a couple of neat tutorials?
I'd love to see that happen, but I'm personally both a terrible writer and tutor, so I wouldn't be able to do it. Sorry, misread, why do you think it wouldn't work on this one?