There's a map pack out for this game, 2 new maps for 80 points. The maps are pretty groovy, one is way up in the sky and is totally open except for large clouds you can fly into, and people can't see inside the clouds. Plus some zeppelins on each side, including flying turrets, and lightning blasts from the clouds.
The other map is this huge mountain with bases on either side, a cave system to get through and it seems like quite a few little paths and tunnels throughout the map. A huge rock avalanche happens, rocks going everywhere, even in the tunnels.