There may be more than one way to do it, but I know that there are some cards that you can plug into laptops which allow you to connect using a cell phone connection. Basically, anywhere you can get a signal on your phone, you can connect to the web. I'm pretty sure Cingular has one, and other companies may offer them as well. The connection speed obviously varies depending on your location and signal strength, and they can be pretty expensive, but such devices are fairly effective for people who are travel a lot with their laptops.