The Squiggle app has to be the coolest thing I have ever seen from the iPad. This app has you drawing musical lines on your iPad to create a harp. You tilt the iPad to play the harp and flip it over to clear the screen.
I knew the iPad could do many things, but I never thought it could become a harp. The designer of the Squiggle app, Henry Chu, is one smart cookie. Out-of-the-box apps like this are what makes me want to purchase an iPad. Check out the video to see the Squiggle app in action.