I have a car cradle that was designed for the iPhone 3G/3Gs (and also works with the iPhone 4 although ever so slightly looser) that I have for sale on the NAM market place (Link here). I decided I needed a protective case for my phone and this cradle no longer fits. The cable provides power and a line-out to your aux port. Tastes great AND less filling!!

PM or email me if interested.