One of our Sprint sources has just given us a heads up that the Samsung Epic 4G will be released on Sprint on August 11th…The source goes on to say that this information is located in the Sprint playbook, and some stores will be opening at 8:00 AM on launch day to meet expected demand. August 11th, one day before the reported DROID 2 launch and the BlackBerry Torch 9800 launch… who is planning on purchasing an Epic 4G?