iPhone gaming site touchArcade published a video of Brother sin Arms: Hour of Heroes, a FPS shooter for the iPhone. Not bad for a phone:
We haven’t gotten that far in the game, so it’s hard to judge value/difficulty. As you can see in the video, the first level seems relatively easy without much risk of getting killed by simple gunfire (though a tank takes me out towards the end). Gameplay is linear with specific checkpoints that must be reached. We’ll try to provide a more thorough review in the near future.