This TaoTronics Bluetooth kit streams music in your car and is down to $20

[iMore.com]

Includes a dual-port USB car charger so you'll have an extra port for charging something else. Plugs in via the Aux port and connects up to 2 Bluetooth devices. The built-in mic has noise cancelling. Attaches via adhesive tape or the air vent clip.

Full story from the iMore Blog...