Spotted by 9to5mac and still in development by conradev over at Hackthatifone, Graviboard will basically kill "gravity" on your iPad Springboard. Install it, assign an activation gesture to it and boom -- icons will start floating around. You can tilt the device to move the icons, and even drag them around.
We're not sure if there's a way back, though. Ok, there is a way back to a normal Springboard, but you don't have to tell your friend who think his iPad is dead -- right? So just watch the video below, and think about the look on your friend's face when he will see something like this.