Just for anyone out there inbetween games or looking for something to play on the side...
Give RoboCraft a go, I wasnt keen when i was shown it, but so far been playing for 2-3weeks and its great fun.
Free game... You build your Tank, Plane , Bomber , Hovercraft out of blocks. Then go into team based battles to earn points and experience. Points means more money for more blocks ( guns shiels etc) eperience allows you to tech up to bigger guns etc.
I would say its a world of tanks mixed with a bit of minecraft.