Tom Vanderbilt of OpinionJournal wrote an editorial on commercials using songs that on closer inspection are bit incongruous with what they’re selling.
On a related note, several weeks ago I wrote about John Densmore’s disgust at bands selling out their music for commercials. I still find it appalling that some of my favorite songs forever lose their original meaning (and appeal) by becoming associated with some crappy consumer product (and being overplayed).