In what we can only assume is part of their community service, after running amok and devouring all that medicine, robots are now visiting our old people in hospitals, leading them in sing-alongs and helping them battle Alzheimer's -- instead of terrorizing them. The Kustaankartano Elderly Centre in Helsinki has brought in a pair of bots designed by the Korean Institute of Science and Technology to entertain patients and lead them though exercise routines. Of course, without legs or proper arms, their usefulness as