Here's a video of the prototype test of ours, you should be able to find more videos from the same channel around the next few weeks after this was posted, that show it working in the final robot. Or maybe not, I don't remember.
http://www.youtube.com/watch?v=LlUgVpRckS8
yeah, this one is pretty good
http://www.youtube.com/watch?v=U6PchiI4bDQ