Sure there is. I'm not saying they'd go there, but they could make a blanket statement that all i{pad,phone} apps be exclusives, and if they see the app appear

Sure there is. I'm not saying they'd go there, but they could make a blanket statement that all i{pad,phone} apps be exclusives, and if they see the app appear in another mobile store, it's gone. Again, I'm not saying they'd go there, but they certainly could.