Rumours (and even leaked photographs) are all saying that Nikon will soon be introducing the D600, a more affordable FX (full frame) camera.
Allthough not 100% confirmed, I certainly see this as a sensible and welcome newcomer to their line-up. Yesterday Nikon paved the way to the D600′s release with brand new Nikkor 24-85mm F2.5-4.5 VR lens.
On FX, this new lens will perform similarly to a 16-57mm F2.8 VR on DX (APS-C). The closest one gets to those specifications on DX, however, is with the expensive but built-like-a-tank Nikon 17-55mm F2.8, or Sigma/Tamron 17-50mm F2.8. The former lacks optical stabilization, while the latter two lack the Nikon badge, and risk more focussing and quality control issues.