German luxury automaker Mercedes-Benz USA recently announced a Media Interface Plus (MIP) for its cars that will let smartphone owners play or stream Pandora Internet radio through their vehicle's sound system. A first from a carmaker, the plug-and-play cable is compatible with the iPhone 3G, 3GS and 4 and a variety of BlackBerry devices. The iPhone Pandora streaming is accomplished through a USB cable, while BlackBerry owners will need to stream it over Bluetooth.