Motion capture… you know?
very expensive technologie?
not now … make your own animation by motion cap. with you WebCam
demo version here!!
http://www.almih.avtlg.ru/index.html
another Link …
this tools is for animat your modele head into 3DSmax
motion capture for head animation controlate by webcam !!! really amazing !!
http://www.eyematic.com
I saw an impressive video of a program that captures someones face and copies it’s expresions on a 3d model. It was called Face station. Although I dont know a link , I believe there was a banner on www.3dtotal.com
my second post … is FaceStation 
!!
woops sorry , with my 56k connection I have a bad habbit not clicking on links since loading the site would probably fail anyway 