Nikon D600 appears in Italian dealer ad
A reader of Dutch magazine Focus spotted the Nikon D600 featured in a Nikon SLR/iLC line-up advertisement by an Italian dealer in Milan(o). You can see the brochure at Focus Media (computer-translated), where they also have "unofficial" specs that talk of a 24mp full frame sensor.
Certainly the launch of the Nikon 28-300mm VR and the most recent Nikon 24-85mm f3.5-4.5G ED VR have been telegraphing the upcoming arrival of a more-affordable/less-insanely-priced 35mm full frame Nikon DSLR.
I forgot to include this in the original post, these are the most recent Nikon DSLR/iLC announcements:

Comments