A bit of an odd request - but we're drawing a blank here. Me and a friend who I've played WoW with for as long as I can remember need a game to play together. She's no idea what to play, and I don't really either. We're not very picky on what it is. It just needs to be some form of massively-multiplayer game, or a co-op game. Something we can have a good time with in the long-term as we wait for MoP/Tera/GW2.
P.S: Not SWTOR. We've gotten to 50 on that already, and frankly, we're not too interested in the endgame.