You've been newly empowered to go ahead and "jailbreak" your iPhone. That's according to a decision by the Library of Congress, which in addition to compiling all the world's books also happens to be home to the U.S. Copyright office. What the decision seems to mean, in practice, is that you no longer are dependent on the Apple App Store for apps. As long as a program has been legally acquired, you are the master of your mobile device, and you can do what you need to do to get the application to run on that unit.