Nature photographer Richard Costin has posted a D3 review:

“There is no denying it, this is an expensive camera aimed squarely at demanding pros and very serious amateurs, but is it worth the price tag? Based on my experiences thus far, Yes. Expensive it is but you get so much camera for your money. Especially in contrast to Canon’s £6000 megapixel upgrade, the 1Ds mkIII (not to say that that isn’t a fine camera, but it’s not for me).

All in all Nikon have delivered big time with the D3, and it represents definite milestone in DSLR history. When paired with the 200-400 I feel this now represents one of the best combination for wildlife photography that has ever been available. It is becoming clear that Nikon weren’t lying when they said this camera was designed exclusively based on real photographer’s requests, needs and feedback. Not perfect, but damn close! “