I don't have Leopard to try it out. Can anyone else answer his question?
Just reading your page & curious to know if your app runs on Leopard?
I have managed to connect the Wiimote as a 'remote control' in System Preferences, but as yet no additional control. Does your system allow for moving the mouse yet? I bought a battery-powered Sensor Bar, so ought to be good to go!
Looking forward to hearing from you!