<NikonFanBoyMode On>
Nikon doesn't need one, due to the fact that dust feels so inferior next to the impressive Nikon electronics that it won't go anywhere near it.
<NikonFanBoyMode Off>
I'd wager a guess that the replacement for the D200 will probably be the first to have it for Nikon (As well as SD cards.... I'm holding out for it.)