Hi,
I hope I post this to the correct forum, but on the 'Wiimote modifications' page of your wiki there is shown an image of the connections of a USB type A connector:

I believe this pinout to be incorrect. If I am not mistaken the D+ and D- signals should be switched. As a reference you could look at this wikipedia page about pinouts where it can be seen that the D+ is located next to the ground and the D- next to the +5V:
http://en.wikipedia.org/wiki/PinoutI guess this doesn't affect your project, because from what I can tell you only use the +5V and the GND. However, I myself was working on another project (which has nothing to do with the wiimote) and found your image via google, which led me to connecting a usb connector incorrectly. Perhaps you can change your image, so others won't make the same mistake and reverse the D+ en D- signals.
kind regards,
Skelter