Downloaded iFighter Lite for free at the app store. I'm addicted. I beat the only map available on the lite version on "easy" yesterday. It took me quite a few tries.
The game reminds me a lot of 1942 for some reason. I loved flying the planes in that game. It's actually what kept me going back to it. Anyway, a simple, fun, addicting game for the iPhone that uses its platform very well. I'll definitely be grabbing the full version when it releases... and will probably play the pants off it!