This year's 2.007 contest is called Ballcano. The playing field is rectangular, and on one side of the short axis is a hill that spits out balls. Points are scored by dropping those balls down holes located at each corner.
Balls are worth one or two points depending on which hole they're in.
For a more complete description, please go to the contest description on the 2.007 Homepage . This is a sketch of the concept that I settled on. When I saw last year's contest, I was fascinated by the wall-crawlers, so I decided to build one myself. This concept is somewhat more complicated than the machine I actually built, but I was trying to be aggressive when I defined it, while maintaining a more viable fallback design. I would like to apologize for the quality of the scan, but colored pencil and isometric paper do not scan well.