Belkin has debuted its new Bluetooth Music Receiver for the iPhone, iPhone 3G, iPhone 3GS, second- and third-generation iPod touch, and other A2DP stereo Bluetooth devices. The new Receiver is a small rounded black box that uses Bluetooth 2.0 with EDR to allow transmission of music from up to 33 feet away, and also includes 3.5mm-to-RCA and 3.5mm-to-3.5mm cables. Belkin’s Bluetooth Music Receiver is available now in the U.S. for $50, and will…