Ok here it is from me myself and this is what I seen with my own eyes. The Official Release Date is : September 8th!!! (Direct Ship Only)
There is nothing about September 3rd in the info, so that date might have been the first one they were going to use, then they changed it.
As of right now there is not a date of release for in store purchase, so its all good just order it. The documents also say that best buy, radio shack, etc.. won't be involved in selling the device, at least not until the phone is relased in stores.
Here are some pics to keep you interested and if you really want to stay on the edge of your seat click on the link below and download full document.