There really needs to be beautiful user-friendly wiki software that "doesn't suck" and by this I mean that it should be:

• Clean and pretty like LocalWiki
• Written in Python (like MoinMoin) or Ruby (Like Instiki (http://instiki.org/)) or at least not PHP (like MediaWiki)
• Using a lightweight markup language (like Gollum)
• Using a WYSIWYG editor, or more accurately, a WYSIWYM editor because it's better (but still have a plain markup option)
• Features a click-to-edit interface (like every form on the Gun.io proposal generator)
• And, one feature that would be awesome is a "moderated edits" option so that it may function more like a CMS for a community. Anyone can suggest an edit but only mods can approve it.

There are also DRCS based wikis (like Hatta) but I'm not sure that would scale well...