i just got a new retina mbp today but since the last few hours I'm trying to find an all-in-one instant messaging app where i can log in to GTalk, Windows Live, two Facebook accounts simultaneously like i do with 'IMO' on my iPad. there are a few web based apps but i need a real app. does such app exists for mac? name the best one? (preferably free but ill pay if its real good) thanks!