Canon EOS-1D Mark III Review at CNET
CNET have published a review of the 10-megapixel Canon EOS-1D Mark III digital SLR camera. 'At first glance, the 1D Mark III doesn't look all that different from its predecessor, the 1D Mark II N. It still has a built-in vertical grip, with duplicate shutter and control buttons, so you don't lose functionality when changing grips. In fact, from the front, the most noticeable difference is that the Mark III has a steeper slope to the camera top on the nongrip side and a smoother slope from the prism hump on both sides. However, even that is difficult to see unless you're very familiar with both cameras.
Turn the Mark III around, though, and you'll see that things have changed quite a bit, largely due to the addition of a 3-inch LCD. This has forced Canon to move some buttons around to make up for the fact that the LCD now extends to the left edge of the camera. Menu and Info buttons move above the screen, while the playback button drops to below it. The Select button from the Mark II N is now obsolete, thanks to the Mark III's Set button, which is mounted in the middle of the large scroll wheel, much like the scroll wheels found on the EOS 30D and 5D. Another feature drawn from those siblings is the tiny joystick controller, which is used to navigate between various menus, among other things.'
Read: Canon EOS-1D Mark III - CNET