There’re also websites that help people figure out the artists that performed songs heard in commercials. At first, I was happy to discover SongTitle.info as there’s one song from a GMC Yukon commercial that I’m still trying to track down (the commercial featured the hulking beasts driving in choreographed circles, synchronized-swimming style).
SongTitle has an entry for “Our Day Will Come” by Ruby & The Romantics (with a link to a sound sample) for the Yukon. But, after listening, I ruled that one out. I don’t hold it against SongTitle, but I suppose they just don’t have the details for that particular commercial.
Even Volkswagen has a CD of collected songs from its commercials. Some of the more obvious ones — such as Mr. Roboto — are on there, but I may just get it to discover some new techno artists (good techo is just so hard to find these days).