This model i made for one fun Blender movie and i would like to share it.
Model is fully riged and in .blend file is packed all what you could need (textures, backup model before applying modifiers, custom shapes for bones - used from here: http://www.blenderguru.com/videos/introduction-to-rigging).
This model is made primary for Cycles renderer but there are also materials setups for BI.
Entire scene is devided into layers.
1 layer - robot model
2 layer - robot armature
10 layer - backup model and bone shapes
11 layer - camera with BG
12 layer - lightning setup for BI
13 layer - lightning setup for Cycles
I hope you like it and it will be useful.