i found this very interesting site at ny times today which titles itself as 'analyzing the details' of the republican debate (the recent youtube one).
aside from the video transcript interface (being able to select a topic and have the video and text jump immediately), there is the transcript analyzer which presents this visualization below:
very cool experience. i'm able to visualize the time blocks and highlight the large blocks to see the topic/text that is taking that area. additionally, you can see how much time each candidate actually talked. it looked like guliani and romney capitalized the time...interesting.
anyhow, a pretty cool/different view on looking at information that is primarily media and presenting it in a different way.