Google Audio Indexing

The other day i was trying google labs and saw thier audio indexing i found it to be an interesting concept has anyone checked this out .. is this implemeted in yutube already ?

 

Is it like audio extracted from embedded videos? If yes, it might helpful for video sites and blogs.

 

I Think its something like they figure out what is bieng spoken in the video see http://labs.google.com/gaudi

 

Audio search is going to become more and more common, which is why its important to include meta tags in your audio files.