I think its a good idea to collect a few galleries in the same place both for inspirational purposes and just for glaring at
So i took a couple galleries i have been to more than once and added them here, an please do add all galleries you know of, lets make it a big collection I would prefer if it were only blender created stuff, the renderer doesnt matter but blender should be the program used.
The blender.org gallery
The creative-3d.net gallery
The blenderartists.org gallery
Centralsource gallery(its dead so the link is to the archived site)