So, you and hundreds of thousands of others picked up your Blu-ray copy of The Dark Knight today, huh? We know you haven't had time to fiddle with the BD-Live extras just yet, but one Joe Lynch from G4 TV has. One of the most intriguing aspects of the flick's interactive feature set is the fan commentary; put simply, users hook up a USB webcam to their player (PS3 included) and then commen
