One should really create a new discussion instead of abusing the comments section for things like.
Hey LG, ya know what? You're right, and I'm abusing it now :-). And that's dangerous. AFAIK unlike a "discussion" object where admin can delete/move/branch/etc the "message" objects it contains, "comment" objects in a "document" can't be managed. It will be there forever, unless some system admin modifies the Clearspace db table directly, but that's crude!
I may add in a document here generic information, probably also about the activity of the project.
Soon, there'll be several documents for a single plugin and they get clutter up with the other plugins' documents. Jivespace may work pretty well now but who knows, the time might come...