I got a Nikon 10.5mm DX fisheye last week and tried it out at the zoo. There are two shots on the nature board, if you are interested. I also tried it out on one of my more willing models -- he works for treats.
Both of these were cropped slightly. Any comments or suggestions for improvement would be appreciated. Oh, f/11 and ISO 400, can't remember the shutter speed on the D200.