Use the NunChucky I2C Breakout Board Adapter to use your Wii Nunchuck controller in your own projects!
The Wii Nunchuck has proven to be an excellent bargain - switches, joystick, and accelerometer in one handy package! But it's a shame to hack off the connector to make use of it, so use the Solarbotics Nunchucky breakout board adapter!
The Nunchucky features:
It's an ideal interface for using your Nunchuck with an Arduino / Freeduino SB, and a BlinkM! (Not included)