An AT&T employee says that any vacations for the last two weeks of September would be denied "due to an event blackout". According to him, the only times this has been done in the past was when an iPhone was released:
Date: Fri, Jul 29, 2011 at 12:27 PM
Subject: Iphone 5 release time
I'm an att employee and my boss just announced that vacation requests for the end of september will be denied due to an "event blackout". Historically the only time they've done this was for an iphone release. So we're looking at the last two weeks of september.
This coincides with previous rumors, so it makes sense. But, like always, take rumors with a spoon of Maldon salt. Actually, it's about Apple, so take a pint.
Do you have more information about this? Send me a mail to email@example.com.