this is something I found out some days ago, he posted a video on his facebook profile of him playing it live - people LOVED the song (so did I, at least until the dubstep part)
Since he usually goes on ustream and plays some music live, apparently somebody recorded it and put it on youtube, it's the best quality I could find and I hope you enjoy it. About the song itself, I read somewhere that it is supposed to come out on deadmau5's new album - can't wait!