I'm not not sure comparing Nikon's 10.2 megapixel D200 to Canon's 12.8 megapixel, full-frame EOS 5D is really a fair fight. After all, Canon's camera has a bigger sensor, higher resolution and much higher price ($3,200, vs. $1,700 for the Nikon). However, DigitalCameraInfo decided to put the two cameras in a head-to-head battle, and came up with some interesting results:

Although the D200 and 5D are placed at different price points, the two cameras are advertised by the manufacturers in the same light - targeting advanced amateurs and hobbyists, along with budget-conscious professionals. Each camera offers double digit resolution, quick and reliable autofocus (though not quite pro level), extensive customization and about as good of a lens mount as is available. Both cameras provide an excellent value in their own right; however, considering the D200 is two thirds the price of the 5D, it should be more appealing to the true value shoppers.

The D200 also presents many advantages over the 5D: you get more speed, a pop-up flash, a better LCD screen, more logical layout and nearly equal image quality at lower ISO settings in a more rugged body. This makes a compelling argument for saving the extra $1,200 or so; however, the 5D's price is justified in two primary respects - the full frame sensor retains the original focal length of all EF lenses, greatly expanding the range of wide angle lenses available, and the camera's high ISO performance and dynamic range creates images competitive with each manufacturer's top-of-the-line models.

In related news, Bona Fide Reviews posted a review of the Nikon Coolpix S3 6.4MP digital camera:

The Coolpix S3 fits in the middle of the range and is aimed at the user seeking style combined with ease of use. In the Coolpix S3, Nikon offers a subcompact design with great looks, a generous 6 megapixel imager, a 3X optical zoom lens, a large 2.5 inch LCD screen, and a feature set designed to make it easy to use, even for the beginner. Some of its features lead the user gently in the direction of better picture composition; others are designed to save images which would otherwise be unacceptable. A docking station makes recharging and image transfer to a computer or printer simple and foolproof. All in all, the Coolpix S3 offers a lot of value for its price - $379 list / $280 street.

BFR Breakdown:
Design: Great looks; very compact and pocketable
Build Quality: Excellent; solidly constructed
Performance: Very good; takes sharp, well-exposed pictures with good color balance
Ease of Use: Very good; most-used controls are readily available by dedicated button/switch or at first level of the menu; has special features to assist in getting better images
Accessories: Dock, AC adapter, cables, strap, and rechargeable battery are supplied; user must buy SD flash memory card separately