I am also in the 717 area code and woke up to DAN. As a side note: Reading and York PA went live with 4G LTE at midnight on 12/4. I do believe that as the diagnostic tests are being done, this would cause Sir DAN to show up on our phones, but AT&T should be able to fix this problem remotely. I do not want to be bothered by having to replace my SIM card when they are the ones with the faulty network.
PS - If it is a SIM card issue, then all of the phones from all over would show the network. Apparently it's just here in 717 AND it's mainly the iPhones. For that matter, if it was the old SIM cards, then ALL 3G, 3Gs, and 4's would have the problem but it's just a random selection...so I don't think that's it. I'm not trying to prove you wrong, I'm just trying to think of another explanation.