I believe this is what you're looking for:
http://www.tesnexus.com/downloads/file.php?id=29223
This is a tutorial by Muspila on animating creatures in blender, it looks like it is very well done.
I don't know of any tutorial on animating heads in Blender and I would like to see one too. I know how to make them in 3dsmax but I don't have the correct version to export these anims (3dsmax 4, I have 3dsmax 5), so I would like to give it a try in Blender.
Does anyone here know how to do them and would be kind enough to explain it quickly to us? It would be very much appreciated