Mysterious Nikon D7100 was seen on the official website of the Norwegian Nikon. The camera is mentioned in the context of invitations to special photo courses Nikon, within which will be available with the new technology, as well as get some tips for using and configuring the camera. Message ends in the following list of photographic equipment, which will be presented in these courses: D5100, D7100, D5000, D3100 and D7000.
Of course, chances are that it's just a typo. Many now believe that was meant camera Nikon P7100, because D7000 appeared relatively recently, in September 2010, and it is unlikely to replace the new model until summer 2012. Anyway, while not confirmed, and any errors are not corrected, the question of the existence of Nikon D7100 remains open.