In the run-up to the Detroit Auto Show, there have been a lot of new hoopties sneak-peeked by luxury car companies, but perhaps none as truly hooked up as the new Audi A8. The A8 is arguably this year's torch-bearer for slick-but-attainable luxury cars: It rolls on an eight-speed gearbox, streams Google Earth maps into its nav system and even does 3-D terrain mapping.
