I reacently downloaded this blender file called ludwig. it had a armature face above the real 3d face and i was wondering how you make it.
The trick is in the IPO window. See character’s IPO settings.
Click on on character, if you open a second window, go to IPO, now you will see the different keys. Select one of the keys, and press n on keyboard. A pop up box appears. This box will tell you which bone is controlling a particular action.