Ok (at least) three systems, not four:


http://wiibrew.org/wiki/Wiimote

I'm not sure if Nintendo can really do sth against using the Wiimote on a PC unless you use this for marketing.

The PC drivers usually do not involve any code or anything else from Nintendo. It's a "simple" Bluetooth device driver. So I doubt a PC driver itself is illegal.

Not only that but if the option to port his game to the Wii comes up later, it'll make the process a bit easier. At least I would assume it would.

Wii mote don't unterest me, but some people could achieve some party games or rythm using it ?

@Sodoku :
Will you publish your configurable 360 controller or does it remains copyright with your game ?

@Ratchet Please... Superku not Sodoku! That is a big difference