The iPhone 5 has materialized at the IFA trade show in Berlin. In mockup form, at least.
The tech-news site GSMIsrael was apparently the first to report on the iPhone 5 mockup, which it claims to have seen courtesy of the CEO of a major cover and case manufacturer. Like just about all the iPhone 5 rumors floating around out there, the mockup is taller than existing iPhones, has a headphone jack on the bottom edge of the phone and features a two-toned backplate.
GSMIsrael didn't identify the case maker that presumably produced the mockup. (Here's a Google-translated version of the Israeli report.) According to The Verge, mass production of cases designed to fit this particular mockup is underway, and could be shipping to retailers within a week.
By the way, 9to5Mac has a good roundup of iPhone 5 mockups, fakes and hoaxes.