Blue Skies is an award winning helicopter shooter arcade game that has been on the App Store since August 2008. The 3GS enhanced version makes use of the pixel shaders that are ONLY found in the new iPhone 3GS. It has per pixel bump mapping and amazing dynamic animated water that demonstrates the true power of the new iPhone 3GS! Besides being a graphical showcase, Blue Skies is a fun and addictive game as well! This has been submitted to Apple and is waiting for approval.
Not my type of game and I usually do not buy a game just to support a developer, but I'll purchase this in hope that it is successful and will push other developers to also make 3GS specific games and who knows maybe the game will spark my interest in the genre. Plus, if I remember correctly, you were on of the early developers who came here to promote/get feedback for your game, which is even better.