Boy Genius Report (BGR) suggests that AT&T is prepping retail employees for a September 5th iPhone launch. According to BGR's sources, supervisors are being told to wrap up training as soon as possible, so that floor staff will be available to handle the traffic in September.
Rumors of a September launch have been prevalent for several weeks now. Last month Morgan Stanley analyst Katy Huberty suggested that production will begin in August, and Reuters claimed that the next iPhone will ship in September back in April of this year.
Of course, there's only one way for us to know for sure. Wait and see.