It seems like every day we hear about a new date for the BlackBerry Bold 9900 to launch in the United States. With any luck we will hear from RIM on launch dates this week. According to the leak posted by PhoneArena, T-Mobile USA will be launching the BlackBerry Bold Touch 9900 on August 31st. The leak shows a $50 mail-in rebate when you attach a $20 data plan or higher. So it looks like a new BlackBerry will be coming just in time for back to school at T-Mobile USA.