At January's CES show, Blaupunkt announced plans to have two car stereos available this fall that will stream digital internet radio via a bluetooth connection from your cellphone. So thousands of stations available as long as you can get a decent data signal.

Presumably they're still on schedule, though Blaupunkt was spun off from Bosch about the time the announcement was made.

The Hamburg 600i is a 1U chassis. The New Jersey 600i is a 2U chassis.

Note: earlier versions of these same radios have been in the market. Make sure you're looking at the new versions.

Blaupunkt and miRoamer bring Internet radio to the car | The Car Tech blog - CNET Reviews

Blaupunkt car radios tune in Internet stations via 3G | ITworld