I'm still on the case with this - just trying to work out how best to set up the stream using two cameras simultaneously (one facing screen, another on the controller). Ideally I'd like to route the PS3 audio directly to the PC for capture (if anyone has any suggestions, they would be most welcome). Failing that, I might have to look into getting a decent enough mic hooked up... the only problem being that I won't be able to rely on my headset, so my skills may be hampered
Couldn't you set your PS3's audio to a different output besides your HDMI cable, that way you could use a splitter?