I just made my first iPhone/iPad game (universal binary). Its called walkabout - the idea is to collect all the stars on each level, but as you walk the path beneath you disappears. You need to think about your route or you'll be stranded!
It has native 1024x768 size graphics for the iPad, and Retina size ones for the iPhone 4 and 320x480 for the iphone 3/touch
Feedback and comments on the App Store greatly appreciated!!
EDIT: Check out the new website for the latest news, walkthroughs and videos
App Store Links:
FREE Lite Version: Walkabout Lite for iPhone, iPod touch, and iPad on the iTunes App Store
$0.99 Full Version: Walkabout for iPhone, iPod touch, and iPad on the iTunes App Store