My parents are on AT&T@Home and they have received several letters regarding the situation. I'm surprised you haven't. The letters said that AT&T is "negotiating" with @Home to prevent interruption of service, but in the event the judge allows them to terminate service they would have an "alternative" in place. They also said my parent's email address might change to @attbroadband.com
I have a backup dial up account with Earthlink, but I'd hate to be stuck with that. The only other local option is DSL, but it's horrible in this area.