CommunityWiki is about communities both online and offline: management, teaching, conflicts, mediation, and some tech talk about tools used for online communities are on topic.
Looks like AlexSchroeder has provided a good general topic wiki with reasonable similarities to C2. What are people's experiences with that site?' -- dl
Well at least it has UnifiedRecentChanges - with MeatballWiki. See http://www.emacswiki.org/cw/RecentNearChanges
Or, in the generic sense, the idea of using a wiki for your community as in TownWiki.