@Swaggasauruz - your solution is what I would call a true hardware solution. It is mechanical and electrical. Hell, I would try it not because I want to multi-box still, but because it sounds like an awesome "Frankenstein's Monster" kind of project.

@schmonz - I think you are correct. We may think of a switch as a hardware only solution, but it is really just moving the software off of the PC to the external box. It still contains some programming and instruction sets to multiplex the signals. I have no idea if Blizz can detect it or not, but I think they would consider it a violation.

I am no expert, these are just my thoughts.