This character represents the culmination of a year in learning Blender's rigging system, and how best to use it. I call it 'the Nathan Rig' in tribute to Nathan Vegdahl, who's rigging knowledge and examples have been invaluable in learning the rigging system as well as I have to date.
The rig is compatible with 2.49 and 2.52 alpha, and uses many simple but effective solutions for things like arm twist, shoulder deformations, and facial animation.
The below video demonstrates how to use him:
Download the latest version of The Nathan Rig:
(original) Blender2.49b version file
Blender2.52 version file