I know this is a minor nit-pick, but I figured I'd post it anyway (it's the details that count, right?).
If you go to the MT main page and scroll down to the list of online users, there seems to be a comma after each name, including the last one. While this problem is purely cosmetic in nature, that last comma shouldn't be there.
Additionally, I think it would be really awesome if the online user list was sorted alphabetically, and not in some semi-random order.