I found this very interesting article from CNet News about an engineer finding some really cool application on the true potential of the Wii remote.  The original article posted by Stephen Shankland can be found at http://www.news.com/8301-13580_3-9858728-39.html?part=dht&tag=nl.e703.

Wii remote used for virtual reality/3D rendering

Wii remote used to simulate over the air "multitouch" (a.k.a. Minority Report-style)