Though not as common in the Colonies, certain markets utilize a Radio Database System to send song info over the FM band. A new patent by Best Buy utilizes this technology and links it, cleverly, with a "memory storage device," and by that they mean an iPod. This technology comes in handy when you're listening to a song on the radio but miss the name/artist. Just hit a button on the stereo and it will record the song info on your iPod. No longer will you have to attempt to google half-remembered lyrics ("Under bloomin onion I saw you?").
How To Make Your Car Cassette Player useful Again [internal]