For those who don't know, X-Fire is a messenger that allows you to chat in pretty much any game you could possibly want. It recently added in support for AIM and MSN, so if you use those, you can log in to them through X-Fire and chat away while playing games, without having to actually leave the window!
If anyone else here has it, I'd like to add ya to my list...
My username's phoenixorion01983