To answer the original question- The song was "Revalations" by Audioslave.
Also, I agree that the organ adds a lot to the mix, Larry O is an old-school hockey guy from Chicago and knows how to create a give and go with the crowd. But there is an expression- "Less Is More". think about it- If all we did have was organ then it would soon loose its luster.
Besides, the different styles of music help to develop an ambiance and vibe during a game that is undeniable.
Not to mention that the players themselves give their music requests and have said how certain songs motivate them while on the ice.
How do I know this? *edit*, I'm Chase McCoy!