The term of Apple and AT&T's iPhone exclusivity deal has long been a mystery -- although USA Today reported a five-year arrangement when the original iPhone came out in 2007, that number has never been independently confirmed, and it's been looking suspect in recent weeks as Verizon iPhone chatter has gotten louder. But we've been doing some digging and we can now confirm that Apple and AT&T entered into a five-year iPhone exclusive in 2007, based on court documents filed by Apple in California. Read on!