Move over XM and Sirius. A new technology allows Internet radio to be heard through a car stereo system. "iRadio," designed by Motorola, uses a specially designed cell phone as an intermediary between the car radio and a personal computer. Subscribers will choose six Internet radio channels and download them from a computer into the phone, the Chicago Tribune reports. When iRadio is on, six buttons on the car radio will correspond to the six Internet channels loaded into the phone. It will also be accessible for listening on phones equipped to handle the new technology. The service is now...