Yeah, its just a mockup. I basically plastered the puppet face on cg Yoda and darkened, desaturated and added grain to the scene to make it look more realistic. Anyway, people like Adywan have really worked magic, especially with his cg morphing on the alien faces in the cantina. If someone like him could rotoscope video of Yoda from ESB and ROTJ onto prequel Yoda's face seamlessly and use that CG style "morphing" to align his facial and mouth movements correctly it would be really cool. A lot of work, but really cool. I'll make more mockups.

EDIT:sorry for the double post