This USB EDGE Modem can handle just about any wireless network you throw at it (as long as that wireless network is either EDGE, GPRS or GSM).
The Falcom Hetro-FlyCard is about as dummy-proof a solution as you can find for connecting to the internet on the go. Just plug your SIM card into the FlyCard, plug the FlyCard into your computer, and you're golden. Using your cell phone data plan, the HET-FLY-E1 can pickup EDGE, GPRS and GSM networks in all of the places that your cell phone would.
That means that you could be cruising down Interstate 80 between Cleveland and Chicago and using your laptop to shop on SewellDirect.com at the same time! How cool is that? (Note: you should not drive and surf the internet at the same time. Please split these duties between two people)