I had found some articles and source codes for Wii controller.

http://onakasuita.org/wii/
http://www.kako.com/neta/2006-019/2006-019.html

Video
http://kilinbox.net/?diary=20061206&category=diary
http://www.itmedia.co.jp/bizid/articles/0612/08/news120_2.html

Anyway we should get WiiRemote, it’s not expensive!

aki