Here we go. Red are joints, green showing parenting. the line of the nose is mainly point holders, and i feel there may be a few more of them when i'm done. Generally I feel that the brow and lip area should be relatively easy. Its the cheeks that really, right from the edge of the nose, mouth, eyes and jaw. Its such a area and volume that deforms in many directions. I was looking at the possiblilty of using spline IK to produce a "stretchy" joint system attached to the jaw. The points of the line can be clustered and controlled for additional manipulation. Of course I could just be letting myself in for a whole heap of trouble. Considering the amount of joints that would be needed as a minimum for control, this rig really needs to be binding efficient. editing weights would be a nightmare...