Just for kicks I stopped by Best Buy and an AT&T store after work (around 3:30) and they both still had lots of 64 GB Black. Picked mine up without issue. 
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By the way. The guy at the AT&T store said that if I cancelled my order with Apple, the subsidized price would take only about 5-10 minutes to show up in the system. I didn't do it because my wife wants the iPhone 5S coming from Apple.
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By the way. The guy at the AT&T store said that if I cancelled my order with Apple, the subsidized price would take only about 5-10 minutes to show up in the system. I didn't do it because my wife wants the iPhone 5S coming from Apple.