A couple of other things you might consider implementing:
- Weblogs.Com pings
- (if we don't have it already) A mechanism to refresh the appropriate RSS feed each time a post is added or edited. Maybe switch to querying the database every time, instead of periodically refreshing the filesystem.
From what I can tell, ideas and information flow
very quickly through the weblog world. Adding these to features would allow OpenACS users to keep up.