I will not lie, I have searched for this many times. The only successful spot I have found is Hoth and, to be honest, it was not that good:
http://www.youtube.com/watch?v=d1UBpZrYR1s
It was acceptable but I could do better. I am currently working on a video introduction, and would love to have someone share a perfect keying-spot for us. Much love,
Evan