GR-239 is a Bluetooth GPS
device with a very simple, cigarette lighter centric design: simply plug it in to your car's lighter socket, and it gives your Bluetooth-enabled device access to GPS data. It's also capable of feeding out its signal over USB -- if you don't mind wires all over the inside of your car -- and is based around the prolific SiRF Star III
chipset which supports external antennae. It's selling for £60 in the UK right now, but there's no word on availability elsewhere just yet.