Yahoo! Audio Search - Worth Investigation

This may be old news to some, but I discovered that Yahoo! has an audio search in beta.

http://audio.search.yahoo.com/

One thing that's interesting is that it acts as a meta search for the big music downloading sites (iTunes, MSN, Rhapsody, etc.), so that you can see which one has the song for the cheapest and in what format. That's definitely great information. It also turns up results for sites hosting mp3's or other sites for free, but with massively mixed results. That in and of itself isn't a gigantic find, but I've found some great sites hosting things like a 1974 Pink Floyd concert at Wembley Stadium. Of course, that show came to my attention from a search for Radiohead. It took some searching, but it's been well worth it, IMO. Happy hunting!