Anyone ever tried this product that allows you to listen to any audio source wirelessly from your FM tuner?

http://catalog.belkin.com/IWCatProductPage.process?Merchant_Id=1&Product_Id=140984

Not that exact same one...

A long time ago, I had one that had a cassette tape thing connected to it so you could play CDs...

Then I got one like that, it works the same as the aux jack thing that everyone is using for the MP3, but you gotta tune it to a radio station.