The rumor cycle this time around for the next iPhone has been a bit unusual — multiple leaks have all depicted the exact same components — but it looks like we'll be seeing what Apple has up its sleeves come Wednesday, September 12th. Our own sources familiar with the matter have confirmed that date, and multiple websites have similar reports as well. iMore broke news of the September 12th date earlier today, and AllThingsD's sources have pegged Apple's event for the week of September 9th. It's still not certain what will be announced at the event, but it seems very likely that it will be the next-generation iPhone. AllThingsD points at Apple's prepayment for inventory components — which rose by $1.15 billion last quarter — as evidence that the next iPhone will be announced at the event. According to the report, such a rise has preceded a major product launch, and, of course, the iPhone 4S was announced just last fall. Either way, we suspect we'll be hearing from Apple soon with an official invite.