I don't think that Joomla is at all appropriate to what we're trying to do here. What we want is a wiki. Joomla is not a wiki, and trying to pretend it is will only end in frustration. Also, I don't like the idea of having this thing be dependent on some person from the forums. That situation is the reason we're not using the FCDB right now. So, I feel like it should be hosted either by Crafty, with someone at Crafty having admin access (even if they never plan to use it); or it should be hosted at a third party site like wikia, in which case it may or may not be appropriate to have someone from Crafty with admin access.
As far as what software is appropriate, I would recommend Mediawiki
, in that order.