Modder mavin Adam Thole wasn't satisfied with the wire dangling from his tilt-sensing Xbox 360 controller -- so he cut it off. Thole has now successfully applied his mod to the wireless version of the 360 controller, including a switch to seamlessly transition between the left analogue stick and tilt control.
Thole plans to produce a how-to video for creating your own tiltable controller using his tiltBoard. For the impatient or unskilled, Thole's selling a pricey pre-built unit on eBay.