While this seems like a natural progression, it got me thinking about the various music search/mashups that I have recently talked about - FoxyTunes Planet, PluggedIn, and others - and how Google is taking their approach but supersetting them with the pure breadth of coverage.
Just think about all of Google's search products (web, image, book, blog, groups, news, finance, local, etc.) and how powerful that could be when built on top of a music/artist search experience. Then fold in their other properties of YouTube, Google Groups, Google Talk (with their scrobbler-esque Music Trends data aggregation), Blogger, Google Maps and their other products. Now feed in their massive audience and reach, and AdSense/AdWords products. Wow. The one piece that they don't surface (that they should) is MP3 search. It never really struck me that they don't surface media files in their results, but it's obvious that they could easily do so if they wanted to. So, I did a little research and found that indeed, it is easy...
Google: -inurl:htm -inurl:html intitle:"index of" "Last modified" mp3
Using this string we are using the "index of" and the inurl commands to attempt to isolate directories only. The mp3 tag on the end tells google to look for mp3s in these open directories. You can change this to wma or ogg if you wish.
You can add additional search criteria to focus your search more.
Google: -inurl:htm -inurl:html intitle:"index of" mp3 "pearl jam"
This command will find open directories with mp3 files with Pearl Jam. Obviously you can change the band name or file type to better define your search.
It is quickly becomes apparent Google could instantly ten-up the rest of the music-specific search/aggregation sites...if they wanted it to. I have no insight if they do or don't... it seems like they have been very careful around the copyright issues in the past but maybe with the YouTube acquisition they are getting a little less risk-averse?
Earlier in the year I suggested that Google should buy Last.fm. Maybe they are just going to build it instead?