How about creating a page that lists in addition to the Latest Additions and Latest Revisions, Latest Corrections and Latest Postings (i.e., in these two cases, a list of the objects that have been corrected or posted to, as with the first two cases), all in one easy-to-access place? Then people will know where the action is!
(Furthermore, it would be interesting to see how -- in a system that allowed users to freely create "meta-level" topic-discussions, the conversation would move from some somewhat off-topic place to the central location for discussing whatever topic it was people were actually thinking about.)
--jcorneli