Getting a free connection is getting rougher and rougher. While I would never use a free connection at home, traveling it's a great deal. I have a cable modem and therefore don't have any access outside my house...no numbers to dial. ;-)
1stUp Corp., the corporation providing AltaVista, MyPoints and many other (probably WebFlyer) is going out of business. So this will be a big ripple in the free ISP world. AltaVista alone had over 3 million members using it's services but didn't see any revenue from it.
In the same week, KMART's Bluelight.com bought Spinway.com who also provided free internet service. With Spinway.com closing, things are getting bleaker...slim pickings.
NetZero and Juno are two options.