Picked up 11" ultimate today...
I placed my order yesterday online, but in my impatience I decided to try my local Apple Store (Valley Fair, Santa Clara.) I was the first one there at 9:20. By 10AM, when the store opened, there were about 30 people in line. I asked for the ultimate configuration, and there were no issues as far as whether they had those; the Apple rep simply went to a Mac and submitted an in-store order. The form he used listed all the configurations they had in stock. (This must be SOP for all the stores now, so all you need to do is ask the employee to look in their system.)
I also got a wireless Epson Wi-Fi printer/copier/scanner free (well, had to pay $100, but easy $100 rebate through Apple that they will file for you on the spot.) I was not offered the "free" printer when I placed my online order.
I was in and out in ten minutes, and I really can't think of a better retail purchase experience than the Apple Store, every single time I buy anything there.
Can't wait to fire up this MBA!