Since Apple completely controls the App Store and reserves the right to refuse any app for any reason (and have shown time and again they are willing to exercise that right), how could this possibly be unenforceable? It is their way or the highway. What is or isn't enforceable is entirely up to them.
Note: I am in no way saying that Apple's stance on this situation is a good one or not, in face, absurd. The iPhone 3G is the last Apple product I will ever buy because of this and other iPod/iPad related anti-developer bullcrap.
Note: I am in no way saying that Apple's stance on this situation is a good one or not, in face, absurd. The iPhone 3G is the last Apple product I will ever buy because of this and other iPod/iPad related anti-developer bullcrap.