Motorola's spray-on ringtone wall

One curiosity at Motorola's CES booth that somehow escaped the eyes of our crack reporting team was this prototype system that enables you to spray a pattern onto a wall sensor, which plays a melody in response to the shape that you draw; you can then print out the pattern with a URL that takes you to a ringtone version of the melody that you can download to your cellphone. Next up: Someone at a law-enforcement agency tries to get this automated and applied to normal brick walls so police can catch graffiti artists by matching their ringtones to their tags. Or maybe not.