I like the innovative approach! I wonder what other types of nature mimicing behavoirs could be used? The side to side swing is very effective, especially using the battery as the pendulum weight. I wonder how effective a many legged approach would be such as a millipede or centipede? It is late summer here and I am still fighting with the ants, they are fast and very able to cover vertical and inverted surfaces. I would love to see something with multiple legs both for speed and to determine efficiency.
Biology continues to provide valuable insights to engineering at all scales from neural data storage, to the interference pattern colors of butterfly wings, to unexpected sensory capabilities, to efficient means of locomotion and flight. There may be unexpected benefits of the time that children spend observing nature on idle afternoons..
It amazes me how far we have gone in robotics in just a matter of a decade. the ROCR is a cute climber but I still like its predecessors more: The RiSE, from boston dynamics' http://www.youtube.com/watch?v=Zs6XmmyfQKQ
The Waalbot by Carnegie Mellon University.http://www.engineeringtv.com/video/Waalbot-Wall-Climbing-Robot