As I drive to work, I listen to my radio. My radio is my friend. It tells me about the traffic, the weather, the local and national news... it sings me songs. Sometimes it even tells me jokes. It tells me all about the latest, greatest products. But lately, my radio has been a little sad. There's a new kind of radio out there, called HD Radio. I think my radio wants to be an HD Radio. It keep mentioning it, about how BMWs come equipped with HD Radios. About the crystal clear sound. ...