I use an Alpine EX10 Bluetooth receiver. BEST $10 I ever spent. It can transmit through FM frequency, or through Line in. Also, you can play your Ipod (this is what I use it for), or connect your Phone through BT. The best thing is that it comes with a Mic so you can listen your streaming music on the EX10, but also make and answer calls. Take a look at, its worth every dime.
http://www.google.com/products/catal...d=0CDQQ8wIwAg#