NetZero.com currently offers basic dial-up service for FREE for up to 10 hours per month.  Includes free Email with mobile access and video chat (can create multiple accounts) and more.  This is the best deal we've seen for a free nationwide dial-up service.

To get this deal, be sure to click the link on the righthand side.

For other NetZero options, including free mobile broadband, see alternate configurations above.