This article is from the The Monster Truck FAQ, by Jeff Hawkins with numerous contributions by others.
A. A client package like Net-Tamer can be run on a cheap computer and
call the home base ISP long distance, grab the mail, and log off in
a couple minutes. Usually under three! Some ISPs have local numbers
in the larger cities nationwide also.
These packages read and answer E-mail offline and can be setup with
Fax software and Fax modems to send/receive faxes in the field also!
Also, check with Juno! They have local phone numbers all over the
country. And the National ISPs - Worldnet, AOL, CIS, Maranatha, Delphi
and many smaller ISPs now have national agreements with other ISPs!