Interesting stuff guys. This kind of stuff interests me, as growing up with Star Wars on video, things like Vader=Anakin Skywalker, Yoda=Jedi Master, and Leia=Luke's Sister have always been common knowledge to me; I've just always known.

It's so true that it could NEVER be kept secret today. One, it would be all over the web, t-shirts, action figures, backpacks, toothbrushes, etc. Two, you just know modern Lucas would be flaunting this special effects breakthrough every chance he could, thus revealing who this funny little green guy was.