Not to cause a stir, but there is at least a grain of truth in Rentboy's statement. I was recently in attendance at an ASL Interpreter's Forum at Union County College in Cranford, NJ at which Alan Champion spoke. Alan Champion is the most notable interpreter for Broadway shows, being the first person to interpret a live performance on Broadway. I had an opportunity to speak with Mr. Champion, asking him what he was currently working on and he told me that he and Candace Broecker-Penn (his long-time colleague) were working on this revival of Pippin in Los Angeles, teaching the sign language to the actors and working closely with the cast and creative team to create an original production, including the casting of several deaf actors. He mentioned that the plan for the production was to start in LA and, if all goes well, move to Broadway. Those are the facts as they were relayed to me by Mr. Champion.
I hold a degree in Musical Theatre from Montclair State University. It is useless. Now I'm funny for money. Oh, and I sing.