Since the end of the summer my dad and I have been working very hard on our first iPhone application. It is a game called "Drop!" and was just added to the App Store today. We are very happy with how it came out, and I think you guys will all like it.
Essentially, you have to steer a skydiver (by tilting the phone), in order to avoid obstacles and fall as far and as long as possible. It supports gamecenter, so you can compete with friends, and has 4 unique levels, all featuring interesting obstacles. Each level has a day and a dusk version. the dusk levels come after you complete the first 4 levels. There are also currently 3 powerups: Free life, jackhammer, and disco power (this ones my favorite).
Here is a pic:
Let me know what you guys think! It is important for me to get as much feedback as possible so I can start improving the game and begin to market this thing!