Just a quick note, that when you use video.google.com to do an advanced search, and select “Subtitles Search only closed captioned videos”, you get cc results from YouTube also.
People are adding captions pretty quickly it seems.
(Subtitled History of Gatorade – view on youtube if embed player is not yet updated)
I already use this feature in my Captioned Video Search, so the results are there.
(I use http://ccmovies.org/fsearch.php to check multiple sites, to make sure I am not duplicating someone else’s captioning efforts.)