Creating subtitles is a very labor intensive process. In your case someone would have to retype out all the dialog, then sequence and timecode each phrase to the video. I have not seen that done for this doc yet, maybe it'll appear on the upcoming bluray.

An option you do have to complete part of the process, is to have youtube mechanically create the transcript. http://www.youtube.com/watch?v=vj9C_rJD8fE is the first part of this doc. I'm not sure how you go about getting youtube to automate the creation of the transcription. But if there's a 'request transcript' option on youtube, you could watch it there to read the dialog.