http://www.firefallthegame.com/ Looks pretty sweet. Don't judge it by the trailer alone, you should look at the gameplay video. It's something that I've actually thought of before, just never into this much depth. The coolest thing I've seen so far is the constant battle for control of the towns, I imagine it could add some longevity to the game. The best thing about it is that it's free! Everyone make sure to register so you can be entered into the closed beta. They're not sure when it'll start, but I'll bet that the earlier you register, the better chance you have of getting in.