Hej Ventura,
I do not know much about wiiyourself, but I wrote a little wrapper for wiiuse.
The addon is far from being finished, I just implemented the button events and acceleration if I remember correctly. Infrared sensing is still missing and it is kind of buggy. I used it successfully for a little project in OS X and linux. Should be cross platform.
Im quite busy this week, but I'll update it after my deadline. As I want to use it for another project.
You can find it here: https://github.com/thomasgeissl/ofxWiiuse
Feel free to contribute, especially the windows part.
Hope this helps a little if you go the wiiuse way.
There is also wiinremote for windows http://onakasuita.org/wii/index-e.html, I haven't checked this, not even sure if it outputs OSC.
Thomas