Garmin just announced this a few days ago. With the house and everything else I don't think I'll be pulling one of these off this year... but next year... yes... next year it will be mine!
Garmin: StreetPilot 2610/2650
Garmin has raised the bar for portable automotive navigation with two new products: the StreetPilot 2610 and 2650.
Just choose your destination using StreetPilot's touch screen or remote control to be automatically guided with turn-by-turn directions and voice prompts. Both the 2610 and 2650 feature color displays, built-in maps, and everything needed to download additional map detail and look up points of interest and addresses in seconds. Select maps and transfer data directly to the unit through a USB connection and onto a standard CompactFlash® memory card. These products are powered using the external speaker with 12/24-volt adapter cable or A/C power adapter (both are included in the purchase).
The StreetPilot 2650 also has dead reckoning capabilities, so you'll continue to get navigation guidance even if you lose GPS reception, such as in intense urban environments with tall buildings and tunnels. To achieve dead reckoning, the 2650 features an internal angular rate sensor, an external speed sensor input, and an external reverse light sensor input. (Please note: The StreetPilot 2650 can only be purchased through auhorized installation dealers because the product requires a connection to a vehicle's speedometer and backup lights. Customers will not be able to buy this product over the counter or install it themselves.)
I have a streetpilot III delux I am trying to sell for $550 OBO.. email me if you are interested at email@example.com
Already have the StreetPilot III. Love it. But I want the new one when it comes out. :-) Thanks though.