Apple's plans for its next iPhone refresh may be getting very tangible, very quickly. It all started when iMore heard that Apple was preparing to hold an event unveiling the new hardware on September 12th, with a launch the following week on September 21st. Although the relative newcomer to the iPhone release date rumor game is still building its track record, that claim may have just gotten some extra meat: AllThingsD is joining in the chorus and touts its own sources pointing to an event in the same timeframe. While it's almost a month earlier in the year than Apple's