Son of a...
Well, I'll get to find out first-hand how good their customer service is.
See, when we went in, we explained that our service contract wasn't quite up yet with our old provider, so we were either just shopping, or we'd buy the phones but delay activating them for the 2 weeks until our contract was up. But they said no need, there's a 30 day grace period.
Well, I just logged into Cingular's site to check the status of the account...we've been charged the $350 early termination penalty.
Guess who gets to sit on hold at lunch today!