There is a subset of music that is not available on the Spotify/Rdio net, for various reasons. If you don't have iTunes Match/Google Music/Amazon Cloud Player w

There is a subset of music that is not available on the Spotify/Rdio net, for various reasons. If you don't have iTunes Match/Google Music/Amazon Cloud Player with this subset synced into, what do you do when you want to listen to a song now? You might find it on YouTube, or you might find it on Grooveshark.