This was my render scene for the Blender Cookie Contest: Create a Robot in Blender!
https://cgcookie.com/image/24h-burnoutbot/
This robot has 269 bones and the rig is the most complicated i have done so far
I rendered this picture with Cycles and i used the Blender Internal Render for getting those halo light effects,
also i use a little bit Photoshop for the postprocessing.
Later I tried to develop a mini game by using the Blender Game Engine, the robot should be main character as you can see in the video I posted. But so far I had no time found continue working on.