I followed a link from SNoT over to Solosier.com, where I found the following useful tip:
Calling their [AT&T, Credit Card companies, etc, etc. ] Tech/Billing support SUCKS. So what you do, is call the New Accounts people. They answer real quick (duh), and just play dumb like "oh, i was trying to reach billing" and 9 times out of 10 they will give you an unpublished number that connects to who you want, really quickly. It's made my life easier.
There's nothing like a little social engineering. W