Wow, this took a long time for me to find
In the last shows I was on with others, I actually used skype and a particular setting on my computer's audio. Unfortunately, it's all in chinese, so I can't read it >_> But there IS a way to do so if you have a PC with a decent sound card.
Alas, the way I found it was all through futzing around with the settings, so I couldn't tell you how I found it exactly. But seriously, just mess around with it.