You need to it a grip on it! Until AT&T gets the device they could care less. These people you are bugging are trying to make a meager living and they do not make it selling hardware they make it by selling AT&T plans. What they have in stock is all that is important to them and NOT what is coming.
I doubt that the SG2 will be their number one phone if the new iPhone 5 hits, too!
Get a SG2 from Amazon, like I did, and stop waiting. It works perfectly on AT&T!