The list of sites here shouldn’t be too long. These would be the main and subsidiary sites of Nikon which showcase the Nikon D80 together with additional details.
Nikon-Image.com
Really nice official Nikon D80 image samples at Nikon-Image.com. Lenses used for the shots were the Nikkor 105mm f/2.8 Macro VR, Nikkor 12-24 f/4 DX, Nikkor 28-70mm F2.8D and Nikkor 24-85mm F2.8-4D. You can follow a related forum discussion here.
Nikon-D80.com
Great interactive site at Nikon-D80.com. Clicking one of the two thumbnails below take you directly to the sub-pages — I really like the 2nd one where you can interactively rotate an image of the Nikon D80 to get a 3-D view of it. The first thumbnail leads you to a photo book with some very nice images and a description of relevant Nikon D80 feature(s) alongside them.
Nikon D80 DigiTutor
The Nikon D80 Digitutor site — view the photo gallery where they show samples of images taken with various pro-level lenses such as the Nikkor 85mm f/1.4D, Nikkor 105mm f/2.8 Macro VR, Nikkor 12-24mm f/4 DX, Nikkor 70-200mm f/2.8 VR (Version II is now available), and the Nikkor 17-55mm f/2.8 DX.
Left and top menus also allow you access to operational notes and tutorial videos. I particularly enjoy the videos; they make it seem as if you’re holding the camera in your hand, pushing the buttons, turning the dials and looking at the big 2.5-inch LCD screen.
There’s also an interactive control panel and viewfinder display — clicking on the icons gives a description of the corresponding icon you’d see on an actual camera.