Hey,
I use a hexaphonic guitar a lot and I'm really excited about the StringPort, however I mostly use it with multiple loudspeakers, so the restriction to a stereo output is deal-breaker for me (I use Windows too buts thats another story).
Perhaps it would be possible to route six channels of processed audio out via the 13-pin output connector, its simple enough to build a seperate breakout box and it would mean the StringPort hardware wouldnt need to change.
Anyway, just a thought,
cheers,
e