That's just for Apple stores I believe, AT&Ts may have them today.. try calling around. When my iPhone was delivered to AT&T today, they also delivered about 3 or 4 iPhones for the stores inventory, so you may just get lucky.. if not, just order one through AT&T. I ordered mine monday night and got it thursday morning(with 15 dollars for priority shipping, not to bad if you ask me)
A friend of mine JUST got back from our Apple Store (Nashville) with 3 8gs in his hand. He just called them up this morning and they had them. Makes you wonder about the accuracy of the availability feature.