Recently a group of folks got together at The Hack Factory, a local hacker space in Minneapolis to create a Rube Goldberg Peep diorama for the local news paper contest. It took many days to build and prep, and about 5.5 hours before we got one complete run done. It was a lot of fun, and I would encourage others to do the same!
Pictures of the device are here: http://www.flickr.com/photos/synackurgfoo/sets/72157629331139340/
Hackerspace website: http://tcmaker.org