Just a little news that applies to both my old job and to the Deaf community at large:
http://googleblog.blogspot.com/2009/11/automatic-captions-in-youtube.html
I think we all knew this would happen sooner or later, and it’s still not here 100%, but now a small subset of Youtube videos have the option of displaying Closed Captions based on some behind-the-scenes speech recognition. I haven’t seen any examples of this used over difficult material, but it’s a start.