Five days after Google announced adding music playable search results to their index, I am now able to see it. It only took about five days, but it is there. Yes, Yahoo has been doing this for a really long time, so Google is playing catch up.
Here is a sample result:
And if you click the play button a window opens up and plays a sample of the song:
Just an FYI - Google had music search back in 2005, just about four years ago. But here is how it now works:
Forum discussion at WebmasterWorld.