Another of those ideas I had (this time when I was trying to implement the TrackBack interface to TypedThreadedDiscussion) but didn't get round to doing anything about. Hence scooped by AlexSchroeder who's implementing it in OddMuse : http://www.emacswiki.org/cgi-bin/community/ThreadServer

Cool! I'll use that instead.

See also the TopicMap comment on WikiIsNothingButLinkBins