For what it's worth guys, it seems like AT&T is getting to them roughly in the order the orders came in.
I ordered in-store, way at the end of the day on the 30th, about 7-8 pm right before the store closed and they JUST updated my status a few hours ago and I got an actual "shipped" status about an hour and half ago.
Most of the people who got their confirmations before me, ordered the phones earlier in the day.
Total speculation here, but I'm betting almost everyone who ordered on the 30th is going to get their phone tomorrow. If your ordered on the 31st or the 1st or something, then maybe Monday... it seems like AT&T may be more on top of this than some of us are giving them credit for.