I read a blog about a cool new service called Fon. You use it for your Intenet connection. If you sign up, it's cheap, but you must offer up half of your Internet connection to let anyone connect to your router. Once you subscribe, you can travel and use others' routers to get your connection. Pretty good idea. You can even make money by selling bandwidth. They'll need a lot of subscribers to blanket enough area to make it really work though.

CNET review
Fon website