Considering how much amusement can be had by using the MacBook Pro's accelerometers for completely unintended purposes, it stands to reason that hacking into the iPhone's sensors would be a virtually endless font of entertainment. It also stood to reason that it was just a matter of time before the ever-persistent hacking community broke its determined way into said sensors, and sure enough, here we have it. Like the successful coder says, the power of the iPhone's 3-axis accelerometer is largely untapped in the OS itself, so it'll be great fun to see what sorts of crazy business the homebrew folks can dream up. Get to work, everyone!