Back in Illinois, when I didn't have an in-dash cd player, I used something exactly like this to broadcast the sound from my discman to my car radio. It worked all right, but it eventually broke. Then I moved here, and eventually bought a cd/mp3 player and went out to buy another one of these doohickeys. I couldn't find one anywhere. I started asking around, and some Radio Shack or Fry's guy informed me that they were not sold in the Bay Area due to the fact that they don't work here. As you mention, too many FM stations to compete with.