If you're sick of using your Wii to play Wii games/gather dust, why not try something new, like this Danish guy did. And use it to mow your lawn.
The University of South Denmark's Kjeld Jensen has come up with the Casmobot, a robotic lawnmower that you control using the motion-sensitive accelerometer found within the Wii Remote. To steer the thing, you just tilt the controller. So, yes, you waggle it. Easy!