According to The New York Times > National > As Satellite Radio Takes Off, It Is Altering the Airwaves, the quick rise of XM and Sirius satellite radio has caused some changes in local radio already...shortening the time of commercials in an hour from 11.7 to 11 minutes and changing of playlists.

I stopped listening to music radio years ago. In the car I listen to mostly news or business, when I'm not listening to the iPod we keep in the car. At home it's a blend of iTunes and Bloomberg Radio.

In the interest of full disclosure, I own stock in Sirius.