Victory!
My buddy called the local

store here this morning, and they told him they had all three models in stock. So we headed down there, got in line about 1pm or so.
Long story short, we ended up waiting about 2.5 hours, but all of us walked out of there with what we wanted. The sales guy I was working with told me that the shipment they got in this morning was the biggest one since the initial launch. When we left around 3:30pm they were sold out of everything but the 16GB Whites.
They had four people selling working the iPhone sales. My transaction should've been simple (current AT&T customer; not porting; no business plan or discounts), but turned into a nightmare because there was a problem with the $100 store credit I had from last year's pricing debacle. It was showing up as "used" in their system and both myself and the associate went rounds with the gift card support line. Finally, the store manager stepped in and got it resolved, but not after my buddy and his fiance had already been done for a good 20 minutes, and they were both porting numbers over from Sprint.
Anyhow, mission accomplished.
And for those of you still waiting to get one, the associate told me that it pays to check in later in the days even if you see no line and assume they don't have any. He said that many folks who arrive late in the day assume they're all gone because there's no line, but in fact they may have 3-4 left of a given model.
Cheers,
Craig