Jabra SP700 Car-Kit Bluetooth Speakerphone for $38.99 after code EMCLPNR55.  Shipping is $2.99 so the total comes to $38.99 shipped.  Note that it comes in bulk packaging, which means no pretty retail box and marketing materials but is otherwise identical.  It plays calls and music from a mobile phone on the vehicle's stereo via FM as well as Bluetooth transmission with background noise reduction and echo cancellation.  This Bluetooth speakerphone also has voice announcement and a night driving mode with no interfering lights at night and many other features.  In addition, it comes with a USB charger, a car charger and a visor clip.  As comparisions, Walmart has it for $109 and Best Buy has it on sale for $79.