I'd like to propose that the 'wiimote' code go into the 'externals/io' folder with the Mac OS X wiimote code, and other I/O devices like hidio, xbee, etc. 'hardware' is a really vague name, even more than 'io' ;).
.hc
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"A cellphone to me is just an opportunity to be irritated wherever you are." - Linus Torvalds