I have a suggestion regarding the forums.
I think it would be handy to be able to subscribe to forum threads, in order to get notified by mail or a special page on the website when there's new posts in this thread.
One use case I can think of is this: I offer a ring or ray, but don't visit the forums regularly. So someone's reply to my offer a few weeks after my initial post (when I stopped checking that thread regularly) would go unnoticed.
Another use case might be, if I'm looking for a person via the forums because my ring is stalled and they don't reply to messages. I might not want to check the forum all the time, but want to know when there's news.
I think it's also useful in forums with many new posts each day, because it's easy to overlook new posts there. Especially when I don't have much time to spend on the forums and just skim the list.