iPhone ideas

It could be possible to make a client application for a game (racing game or similar would be the best example) that provide the accelerometer input to your mac to control your car. We have just seen in the WWDC2008 keynote some games on the iPhone that use that input. Providing it to a game could be funny… You move your iPhone to steer, accelerate or decelerate holding your left or right thumb on the screen and change gear with a sudden pitch (rotation forward and back – or back and forward on the x axis). You could also have an area on the iPhone to pause the game…
I hope the image is clearer than what I have written down…

I don’t know if it’s technically feasible but perhaps using the data from accelerometers on the iPhone and with the help of something to stitch the iPhone to your hand a 3D joystick could be made. I mean something to control an application or a game on your Mac like you do with a Wiimote… It comes to mind that if it could be made by mean only of accelerometers the guys at Nintendo would have not used the IR sensors together with the accelerometers…. Just another silly idea perhaps…