Free 3D Models + Rigs

Models:

http://sketchup.google.com/3dwarehouse/ (requires sketchup)

http://www.turbosquid.com/Search/3D-Models/free

http://thefree3dmodels.com/

http://www.3dmodelfree.com/

http://artist-3d.com/

http://archive3d.net/

Rigs:

http://www.11secondclub.com/resources