Here's a do-it-yourself kit on how to make wireless work for you wherever you go, with a little homemade box powered by a car's cigarette lighter:
To use it all you do is plug it in to the cigarette lighter of a car (or a 12v supply when at home). It automatically boots up and links in to Verizon's "Broadband Access" service, turning itself into an access point. Turn on your laptop, join the network and voila -- you're on the net! It's just like using a hotspot (such as they have at Starbucks and airports), but it goes anywhere you car goes.
I haven't yet ventured far enough into geek-dom to try to make one of these, but it's nice to know someone's working on it for the rest of us.