Follow member feature?
While it is possible to see a member's posts from their profile page, it might be nice to have a more sophisticated way of following other members posts. It could be a specific feature to create a list of members to follow (perhaps from a link on their profile page) and then have a special search page which would find their posts in reverse chronological order, or it could just be the ability to use the advanced search to find posts for multiple members without having to specify a keyword in the search.
Do you mean something like following on linkedin(or other networking websites), in your profile to have a new section containing a list of updates (posts, new/edited wiki) of the people you follow? Or just a new search functionality?
I'm suggesting one or both of those. Personally, I think the first option would be better, but I image the second option would be easier to implement.