We released our Global Game Jam game "universe within" on Apple App Store for the iPad! (My first ever app on the App Store!!)
It's much better to play the game on the iPad making use of the accelerometer (than trying to til your Mac book). Also the screen resolution made it a natural fit for the iPad. A tweaked iPhone version may follow later.
You can find in on iTunes here - http://itunes.apple.com/us/app/universe-within/id523392835?ls=1&mt=8 - or search for "universe within" from App Store on the iPad.
I haven't had the time to post any of the technical details of the porting process. Drop me a line if you are interested in knowing more about it.