I ordered my 16gb on 7/20 via premier and I'm still on backorder.
The premier website says I ordered the 20th, but updated the 22nd, and the att website (with the BO) says I ordered the 22nd.
I REALLY hope they know I ordered the 20th, because I need my iphone before I leave town next Thursday.
based on what I've seen here, it will go by the regular website..there is hope for you though, they still take things off backorder of the weekend and there is a lot of phones moved on Tuesday so I would bet you get your phone on or before Thursday.