Andreas Bulling from Zürich sent me a link to some amazingly creative Wii projects: http://www.cs.cmu.edu/~johnny/projects/wii/ - it is really interesting how many people play with this device and get interesting ideas going!
At the TEI'08 conference in Bonn Susanne Boll an her team presented interesting work on gesture recognition using Wiimote’s acceleration sensor . People from Georgia Tech presented another idea using this controller: WiiArt . We currently think of using it in teaching to make some exercises (e.g. measuring Fits' law ;-) more exciting...
 Schlömer, T., Poppinga, B., Henze, N., and Boll, S. 2008. Gesture recognition with a Wii controller. In Proceedings of the 2nd international Conference on Tangible and Embedded interaction (Bonn, Germany, February 18 - 20, 2008). TEI '08. ACM, New York, NY, 11-14. DOI= http://doi.acm.org/10.1145/1347390.1347395
 Lee, H., Kim, H., Gupta, G., and Mazalek, A. 2008. WiiArts: creating collaborative art experience with WiiRemote interaction. In Proceedings of the 2nd international Conference on Tangible and Embedded interaction (Bonn, Germany, February 18 - 20, 2008). TEI '08. ACM, New York, NY, 33-36. DOI= http://doi.acm.org/10.1145/1347390.1347400