Searching for music, pdf and more via Google

I recently came across a number of sites that integrated google search to allow them to search for music online using Google's powerful search keywords. Here's a list of a few that I found:

http://www.ironlab.org/projects/findmusic.php
http://www.tyoogle.com/
http://www.g2p.org/
http://www.goofile.be./


In case anyone wonders what exactly some of the search strings are so you don't have to remember any of these URLs and want to go through google yourselves here's a couple links that talk about the search strings:

i-hacked
Mark and Angel