There's a little programm called shairport that does exactly what your app did, it pretends to be an Airport enabled device. It can only do that because someone extracted the encryption key from an Airport Express ROM. From what I understand, Apple designed the communication protocol so that that key is needed to communicate with an Aiport enabled device, and that's probably what they effectively hand out to the companies that buy a license. If you guys used that key or found some other way around the procedure that Apple originally intended, then grats to you, you found a loophole. But in finding it, you guys stepped on Apple's toes. If I was you, I would have been very quiet about this. But fighting over this in public makes you guys look really foolish in my point of view.