http://science.slashdot.org/article.pl?sid=09/05/18/163223&art_pos=8 There is an interesting comment talking about a 4-motor belt with analog control (sinusidal amplitudes) of the motors, and he links here: http://sf0.org/tasks/Bite-the-Transhumanist-Bullet Looks like there is yet more interest in this stuff :-) Eric