According to a screenshot obtained by the BoyGeniusReport, AT&T is informing customers that they will have a 1 to 2 week wait for the new device:
"Due to the extraordinary demand for the iPhone 3G S, all customers placing preorders on Saturday, June 13, 2009, and later, should be informed that their order will arrive at the store 7 to 14 days from the order date.
Only preorders placed Friday, June 12, 2009, or earlier, are expected to arrive in time for the 7:00 a.m. opening on Friday, June 19, 2009. Customers will receive an e-mail notification when their new iPhone 3G S has arrived and is available for pick up.
Preordering is still a great option for customers to guarantee they receive their iPhone 3G S as quickly as possible."
Remember there still is the regular line at AT&T, the Apple Store, Wal-Mart, and Best Buy.