BlendShape Cominbation System by Daniel Pook-Kolb? I'm sure you're familiar with it as I heard about it on Spiraloid. (which by the way rocks)
From what I hear BCS is same concept as Gollum's rig in LOTR?
It looks soooo amazing, but the documentation is very all-or-nothing whereas I feel the plugin can be used to varying degrees of sophistication...
ANYONE doing blendshapes should definitely check this out...
http://dpk.stargrav.com/pafiledb/pafiledb....=file&id=31