There are already several ways to integrate an iPhone with your car stereo today. Some folks use the 30 pin connector cable, some use stereo Bluetooth, and some just use the good old fashioned stereo out cable. Oxygen Audio's OCAR takes the iPhone integration a bit more seriously as they developed the stereo around the iPhone.
So what do you get with this clean looking OCAR in-dash stereo? You get a place to place your iPhone (supports landscape or portrait orientation), an RDS-enabled AM/FM tuner, a 4-channel 55-watt amplifier, Bluetooth, etc,