Digital music downloadable from the Internet; Digital music system that synchronizes digital music files stored on a home unit and a car unit; Digital music systems that synchronize digital radio files stored on a home unit, a car unit, or portable unit and that may be backed up to an internet depository; Downloadable image file containing artwork, text, audio, video, games and Internet Web links relating to sporting and cultural activities; Downloadable MP3 files, MP3 recordings, on-line dis...