haha I'm wondering the same thing dude... I thought it was like some secret chat thing, but...no. i thought theyd show up on the right side or something so you can tell if your chums are on or not... too many people talk to me anyway, at least they did...i thought it would help me keep 'em straight.
well lets say i send a lot of messages to SamCaylor. If he isnt on its a hassle to send him a message because I have to go to Interact > Members > S > SamCaylor. If hes on my friend list I can just go Interact > Members > SamCaylor's profile and send him a message.