I LOVE the friends online little circles with their faces in them, (what I refer to as avatars). It would be super cool to extend that functionality to the forums, where every post has a little picture of the poster next to it. This would help make a visual connection between usernames and faces, as well as bridge the gap between forum interactions and in-game interactions. It's kind of jarring right now to see someone in-game that you've talked to on the forums.
Apologies if this has already come up - I couldn't find anything in my search about it.