As Internet radio appliances are becoming available, there is still the issue that they can’t be used in your car.
This could change thanks to so-called “in-car WiFi routers” which are designed to provide Internet access through 3G mobile telephony networks.
AutoNet Mobile offers such device and service combination:
we create a Wi-Fi hot spot that allows everyone in the car to connect multiple devices to the internet, in and around the car! it’s the next step in in-car entertainment and productvity. we make internet in your car easier than ever because we provide both the in-car router and the monthly service. our affordable monthly service plans start at only $29 per month.
This still represent an expensive proposition for radio though. One hour daily consumption of good quality Internet radio content could easily reach the 29$ 1Gb limit.