To be fair, I think the FM Radio receiver program is still usable in portrait, because you can see the frequency being received, still use the actual while part to scroll left/right, and the drop-down buttons at the top pop up correctly. In fact, you can even make the saved radio stations button pop up - since the entire bottom bar is the saved stations button (however, I don't have any stations saved, so I don't know how well that menu looks in portrait).