I always thought the Pioneer AppRadio was a cool concept, and now you can get one for ~$279 after mail-in rebate. The rebate is only good for units purchased between Feb. 15 and April 30, 2013.
Connected Car Mail-In Rebate | Pioneer Electronics USA

The only problem that I have with the AppRadio 2 is that it doesn't have 4v outputs or a CD player. But if you primarily use your iPhone or Android phone as a source unit, it looks awesome...especially with a bright capacitive touch screen.