After this post, I was very interested in learning more about emulators for the Gamecube:
http://www.racketboy.com/forum/viewtopic.php?t=2798
This seems to be the only site I can easily find any information on:
http://gcemu.dcemu.co.uk/
However, there doesn't seem to be a concise listing of what the status is of every emulator (compatibility/speed/sound) and which ones support running via this new method.
Can anybody help make up a brief guide?