According to reports, just as last year, AT&T is asking for vacations to be rescheduled, and has said that no other vacations will be approved for the period deemed to be a "heavy selling period," June 15 to July 12.
Now, some are pointing at June 29th, which would be the one year anniversary of the iPhone launch, as the obvious day - but that happens to be a Sunday, so that's probably not likely.
Still, the timing is actually perfect, with WWDC this year running from June 9 - 13.
It looks like we're getting close to a launch, and a 3G iPhone - I might even buy into.
Source: By Tech Ex