Anyone looking to get new customer pricing on the 3GS and wasn't upgrade eligible for that pricing might want to check again. I just rechecked my upgrade pricing and it's now $199/$299 (down from $399/$499 in july). ATT also told me (in july) that I wasn't eligible for the new customer pricing until December.
So check your upgrade status on ATT's website, it might've changed.
So check your upgrade status on ATT's website, it might've changed.