I can't find a suggestions section for the forum, that could be because I am blind, but I have some ideas.
1) I really like the way Phillyblog gives out names for the number of posts one makes. Such as Pretzel Vendor and so on. I would like to see that as well here and I would like to see it broken down by fewer posts. So a status at the beginning level, after 100 posts, 250 posts, 500 posts and so on. I think this will encourage people to post more as people are obsessed with status. Also, to distinguish the Forum from Phillyblog I would like to see different names. Set on a theme other then food and run with that. Maybe a sports theme.
2) I also like the way phillyblog presents the posting. Imagine the Forum's current layout for posting with one of those marathon threads with over a hundred posts, I think it would become difficult to use.
I will post more as i think of them.