Well, for those of you who remember cpwiki.sf.net (a FAQ created by various members of this board).
The greatest issue was speed. However, sf.net now offers "hosted apps", one of which is MediaWiki. I've "added it to the queue for creation", if it fixes the speed issues (which it should) then perhaps we can use cpwiki a bit more?
cpwiki seems to be a lot faster lately... same for anyone else?