Soo, this is what I have to add to this thread.
I ordered as soon as I could on 09/14
Started trying at 3AM EDT. After Apple.com didn't go live for me (Cache / cookies issue) and the Apple Store App on my iPhone 4 wouldn't complete my order, I went to AT&T.com and managed to get in at 3:17AM EDT to place my order for a 32GB black iPhone 5.
The order went through smoothly and was immediately sent a text based confirmation email followed up by a formatted HTML confirmation stating that my iPhone 5 would be delivered on 09/21. I feel confident that it will.
AT&T put a hold on $317 USD which sat there from the night I ordered the phone until yesterday or today. Now there's no hold charge and my bank account shows the funds as accessible. I remember this also being the case when i pre-ordered my iPhone 4 in 2010.
In 2010 I received my iPhone 4 a day before launch day, on Thursday and it was just like this.
This is the first confirmation email I received at 03:17am EDT
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My current order status: Order confirmed 3:17am EDT on 09/14/2012, In Progress
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To add, I was never on backorder that I could tell. I checked order status daily.