My friend Félix is still improving his Wiican project, a software for configuring and management of your wiimote under GNU/Linux.
Now he is adding D-Bus so third apps can manage the wiimote as they want through it dbus interface. It seems pretty cool to me, but he explain it better at his blog.
By now he has two posts telling us his progress:
I hope you enjoy this project and (as me) the progress he is doing and explaining.