Nope. Sorry. I used to only use MSN, but then Microsoft started charging for it and I said "**** it" and din't bother redownloading when they decided that it would be free again. I'm pretty sure that MSN and Yahoo Messenger can communicate, though. Wouldn't swear on it, but I think so.
Heh. Maybe. Like I said, one cool thing did happen. Gave me a little hope.