I've been following this show's progress for a couple years, and I'm still hoping to get out to California to see it this summer, but in the meantime, Disney has posted this interesting video, featuring Senior Technical Director Chuck Davis:
You can see the lighting console (GrandMA, I think, but notice that, as usual, the lawyers have prevented any actual useful information from escaping). Thanks Dave Christoffers for the facebook link!
Oh, and it looks like they are taking the show on the road! (to California, anyway)