Well, it looks like won't have to wait until CES for more details on Garmin's new ecoRoute ESP module after all, as a listing for the device has now already turned up on GPSCity.com, and the site has even provided us with a few additional, as yet unofficial availability details. Apparently, the cable (which ties directly into your car's on board diagnostic system) will run $149.99 and might "possibly" be available by the end of the year, but is more likely to roll out sometime in the first quarter of 2010 --- and it'll supposedly only work with nuvi 1xxx series units that have Bluetooth. If that's not enough for you, the site also has what appears to be the first set of screenshots of the interface, which detail everything from speed and breaking to fuel economy and your carbon footprint. Hit up the link below for the complete rundown.