Just as commuters are catching up to the idea of satellite radio for their cars, former graduate students at Carnegie Mellon University have developed a next-generation radio concept that allows users to tune into music from iPods and other digital music players in nearby cars. The students made their codes for the prototype public, so others can revise the system, if they choose. The idea, which the students developed for an unidentified "major automaker" last year, is called Roadcasting. Using it, you could tune your radio to music playlists coming from other cars within a 30-mile radius. Or you could transmit your own list of songs for people in other nearby cars to listen to. Perhaps best of all, the Roadcasting software would learn what songs or musical genres you like. Using those preferences, it would sift through all the broadcasts available at any one time and choose the ones you should like best. Every time you turned on the Roadcasting apparatus, it would find an ad hoc radio station -- or create a mix of songs -- with your tastes in mind. [PITTSBURG POST-GAZETTE via Agenda Inc.]