Apple won't help them, because Airfoil is more or less a reverse engineering of Apple's protocol, and it's one that they choose not to share. This move was deliberately made to prevent apps like Airfoil from working. For what it's worth, I'm fine with it - Apple doesn't have to open their protocols just no like one has to buy their products, and Rogue Amoeba's complaints here are the same as anyone who builds off Google's APIs - if you're not paying for the product, expect it can go away at any time, taking your revenue with it.