[mandolin!]

Just watching tv and this guy came on with a stereo guitar he had designed and built:

http://www.abc.net.au/tv/newinventors/txt/s2486561.htm

He has other designs on his websites: http://www.kinnyguitar.com/Stereo%20Acoustic.htm

I would absolutely love to hear how this instrument sounds, recorded in true acoustic stereo, rather than two mikes near one hole...