If you weren't aware, the new PowerBooks contain motion detectors that are used to shut down the hard drive in the event the machine is suddenly dropped. That's not particularly innovative, but what is is the fact that there is a user accessible interface to the motion sensor. Amit Singh has released software that allows the computer itself to be used as an input device. Check out the movie should someone using their PowerBook to drive Google Maps.
Using Your PowerBook as an Input Device
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