There is an interesting article in Radio World, published yesterday. It talks about the NAB effort to get better metadata on radio (artist, title, album art, etc). And there is an interesting discussion of the future of HD Radio and the possibility of all-digital radio.
http://www.radioworld.com/digital-radio/0014/nab-promotes-metadata-best-practices/341229
http://www.radioworld.com/digital-radio/0014/nab-promotes-metadata-best-practices/341229