Wiki is a MOO.  A wiki page is a MOO room.  WikiWords are doors.  Some changes to a wiki page are like conversations within a room, others are like writings on the wall or part of the room's description. 

Is it helpful to divide a wiki page into two sections (i.e. moderated top half and unmoderated bottom half)?  What about using passage of time to distinguish conversations from yesterday and today.  Will a calendar on a side like blogs help?  At least sense of time seem more intuitive than versions.