Wiiji!

SourceForge presents the DarwiinRemote project. DarwiinRemote is an open source application. SourceForge provides the world's largest selection of Open Source Software. DarwiinRemote is a tiny program & library which reads data from and sends data to Nintendo Wii Remote (Wiimote), nunchuk, & classic controller.

wjoy - Nintendo wiimote driver for Mac OS X