Wiimote enabled whammy bar
Rob Morris' Wiimote hacked guitar is extremely cool: he's able to use the built-in accelerometer as a pitch-changing whammy bar by simply raising or dipping the guitar, and he can pull off even more fantastic sounds by pressing the Wiimote's face buttons. And then, of course, there's the fact that his band is called Vivian Darkbloom, making him — at the very least — Humbert Humbird's new favorite musician.
Wiimote Guitar Effects Control [Hack A Day]

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This brings to mind two things. First the turbo-charged lawn mower racers. When asked about putting a turbo-charger on a lawn mower the redneck said, well you've got lawn mowers and you've got turbo-chargers, it's only a matter of time before someone puts the two together.
The second thing, terms of use run counter to innovation.
Now two questions:
How long would it take for a Nintendo engineer to put a Wiimote on a guitar?
How long does it take for one in a zillion Nintendo customers to put a Wiimote on a guitar?
"This brings to mind two things. First the turbo-charged lawn mower racers."
Best opening lines ever.
Thanks
Here's my dream Wiimote project: The dancing suit.
Picture this. You have a suit, which is covered with dozens or even hundreds of LEDs of different colors. Somewhere in the suit, you have a bluetooth reciever hooked to a circuit that controls the LEDs. The Wiimotes (or some other sort of accelerometer device) go in the sleeves and legs of the suit, and transmit their telemetry to the circuit board, which tells the LEDs how to behave. And as you dance, your suit pulses, glows, changes color, and makes one heckuva disco-tastic light show.
Now, someone go make me one.