We previously heard that the Nikon D4 was set to come out in "mid-March" with the D800 following a week or two later, but if Amazon's listings are anything to go by it looks like both cameras will be available on March 20th. The retailer has placed both full-frame shooters back up for preorder, and we'd definitely advise anyone interested to go that direction — pro-level Nikon cameras are often sold out for several months after release. You'll even save 95 cents on Nikon's list price, with the 16-megapixel D4 going for $5999.00 and the D800 at $2999.00 (both in body-only form). The D800E doesn't have a release date listed, but is also available to preorder for anyone interested in paying a $300 premium to remove the anti-aliasing filter.