Loot Ninja spent a good bit of time this morning in the Warhawk beta on PS3, and they think this will be a must have when it's released.
The controls are really good for both ground and aerial combat. There's also a ton of weapons including hand-held guns and grenades, upgraded weapons for tanks and jeeps, and upgraded weapons for the aircraft. Not to mention all the crazy turrets you can hop on. Loot Ninja's personal favorite: the flamethrower.
The sound in the game is amazing. It features full 7.1 channel uncompressed Linear PCM, which is astounding.