I recently heard about Airplay as a possible solution for listening to music both on my macbook and ipod (hooked up to Bose speakers) simultaneously in different rooms around the house via WiFi. However, it is not clear to me how to set this up. Do I have to plug the ipod speakers into an airport express? or do I have to replace my expensive Bose speakers for my ipod with the new AirPlay compatible speakers that are coming out? It would make more sense to me if this could all be done with apps and I wouldn't have to purchase additional hardware (airport express or special speakers) in order to listen to music in multiple rooms. I checked out Airfoil as a solution, but I am hoping that Airplay will do the same and better. I downloaded the latest Itunes and os for my ipod, but I don't know how to setup Airplay in order to stream music throughout the house.