Yes, there are already scores of websites describing all the 3D links you need on the Internet, but still, I wanted to make my own list. The sites herein are the ones that are in my bookmarks, the ones that I visit regularily, the ones that have interesting resources you won't find anywhere else, or simply websites I visit when I am in need of inspiration.
David Lloyd is a gifted Bryce user and modeller that makes stunning medieval scenes involving dozens and sometimes hundreds of Poser characters. He explains how he made some of his images in a series of tutorials.
A great 3d illustrator working with the press. His first websites were impressive mixes of Flash and Poser characters rendered in 3ds Max.
Taking a look at his website, I just realized he was also a very experienced nature photographer, one of the few capable of getting nice photos of the elusive european wildcat.