Autonet mobile, the company responsible for putting the Internet inside of Avis rentals is selling their WiFi car router to the public this spring. The routers plug into your ciggy adapter, and use what sounds like EV-DO via Virgin Mobile. Interesting. Speeds should hit 400 kbps to 1 mbps, as we reported before. But the pricing sounds like it might be the catch.
At $400 for the hardware, it's not exactly cheap. (Monthly is a nice $50, though. )If pricing stays at this level, you might want to get one of those Kyocera WiFi/EV-DO portable routers for less, and have a dedicated card you can use in your lappie outside of the car.