If you think they can't cut off any other phone not registered with th dev program, you're greatly mistaken..The phone also has to be registered with Apple to be used as a dev device and they will be able to cut it off at will. Yet another reason to wait.![]()
But a jailbroken iphone with 4.0 has a very high chance of becoming a bricked jailbroken iphone with 4.0. Tis the risk you take.