I found this while nosing around (URL) lifters go up and down simulated carbon nanotube ribbons. Hope you find it interesting. (20 years ago, 24-May-04, to lugnet.mediawatch, lugnet.technic, lugnet.robotics)
(...) That's pretty cool. The Robot Society of America (RSA) listed on that page, has hosted a couple ribbon climbing competitions, including one at the ROBOlympics in March with a grand prize of $1000 for the fastest robot to climb the ribbon. (...) (20 years ago, 24-May-04, to lugnet.mediawatch)