i installed cwiid (and needed dependencys) and ran wmgui and successfully connected to wiimote and got readouts and it sees the nunchuck, although i have no messed with it a lot (more tomorrow). It seems like it uses the uinput and joydev mods. So making it work 100% shouldn't be too hard. What does wiicontrol use for a backend?

Edit: and yes i could get input from the nunchuck. Just didnt try any mapping yet.