The iPhone will launch June 29, at 6:00 p.m. local time, according to a Mac Rumors report. The report claims that a memo sent by AT&T has confirmed the rolling launch, stating, “The iPhone will go on sale on at AT&T retail stores June 29 at 6 p.m. local time in each market.” During his keynote address at WWDC, Apple CEO Steve Jobs mentioned that the phone would launch at 6:00 p.m., but did not give further clarification. If true,…