At EarthPhotos.com we use Nikon gear, specifically, a D200 body backed up by an older D70. We've expected to upgrade to a D300 next, but suddenly, now comes the new D700 reviewed here by Stille Photographie. Thanks to PhotographyBlog for the link. Also see Ken Rockwell's review.
Today, the D70 body sells for maybe $700, the D200 around $1000, the D300 $1600 - $1700, and the D700 looks like shipping for around $3000, starting in a couple of weeks. By comparison, Nikon's pro D3 runs something between $4000 and $5000.