1. A handheld computing device comprising: a motion detection sensor(s), to detect motion of the computing device in one or more of six (6) fields of motion and to generate an indication of such motion; and a motion control agent, responsive to motion indications received from the one or more motion detectors, to selectively generate control signals to modify one or more of the operating state and/or the displayed content of the computing device based, at least in part, on the motion indications.