Guys, I found a very cool game that I think several of you would enjoy very much.
It's called:
http://www.worldoftanks.com/
It's in a closed beta at the moment, but you can get keys from lots of places by googling World of Tanks closed beta. I actually grabbed 3 keys and have 3 different accounts. I did this because the betas offer use of an exclusive tank, but that tank stinks, so you sell it for some nice starting money.
It's a 15 on 15 open field or urban tank battle. All of the vehicles in the game are from the 1930-1950 era. You start out with crappy tanks and then like an MMO you choose which path you want to go do. It's sort of the same as a FPS in that you can go back and make other choices later, but the time invested ing etting to the really good weapons and vehicles is significant.
When you unlock a vehicle, you then have to progress down it's technology tree (bigger engines, better guns, suspensions, etc. It takes awhile to move to the next vehicle in the lin.
You can play as a Tank (Light -> Medium -> Heavy), a Tank Destroyer, or a Self-Propelled Gun. SPG play is top down like Arty in BF2. it's high risk, high reward.
I have been playing for about a week and gotten about half-way through the Tank Destroy (like a sniper in a FPS) line.
The games range from obnoxously quick to long and strategic.
Let me know if you check it out