I learn character’s rig of BB Bunny (and Sintel too)
Why blender artists use double (bones and mesh) rig deformers
There is new link
https://dl.dropboxusercontent.com/u/34973756/Bird_15.jpg
You link is broken… I’m not sure what you are asking…
Randy
and…
OK, now I know what you are asking…
The bones deform the mesh cage, the green one that is selected in your screenshot. The mesh cage then deforms the character mesh.
More info can be found here:http://www.blender.org/development/release-logs/blender-246/mesh-deform/
Randy