After wrestling with AT&T Friday night (where she was told that our “connectiods must have reset”), we got direct connection to the net back up, but the wireless routers still wouldn’t work. After a frustrating struggle on Saturday morning where the wireless setup still wasn’t working, Jennifer stumbled on some “AT&T only” advice from someone who’d gone through it themselves.
The trick was that instead of setting up the connection as PPoE (which it was), AT&T forces you to set it up as DHCP… and after the setup fails switch to PPoE. Somehow, it worked, and we have internet at home again.