I'm not talking about Apple's technology, I am talking about the schematics. It doesnt matter if they need or want Apples cooperation - they are not going to get any. What drivers has RTI come up with that have been proprietary in nature from a non-business partner? If it were easy it would be done all ready. Just because UPnP is widely publicized doesnt mean you can come up with a Sonos module easily. It requires testing without working with the company itself. Kind of like reverse enginerring the control and feedback.