The recently announced Nikon D610 35mm full frame DSLR is now in-stock and shipping for $2000 at Amazon by various along with B&H Photo which offers three freebies with it (16GB card, extra 3rd-party battery, shoulder bag) and is eligible for the optional Nikon Instant Rebates (look for the small link under "Buy Together & Save"). It is also in-stock for $2000 at OneCall.com and Best Buy et al.
The way Nikon handled the D600 issues and quickly announced a "replacement" angered some D600 owners at least. Here is an indicative reaction of the frustration. Nikon's "Canon 1D Mark III" moment?