@ajm3: It did after all say it uses a 8GB SDHC. Im guessing it downloads the necessary information for a 10mile radius or maybe a mile radius and refreshes it after every minute.

I say everyminute because 60mph=1mile a minute or maybe it has the traffic monitor too and lets you know which is the best route.

Why cant we get something this good instead of getting crappy old devices and late technology???