All right, so technically this isn't a Rube Goldberg machine
(it doesn't actually perform a task, merely loops endlessly), but the spirit is the same. Students in the Media Interaction and Design program at the University of Applied Sciences FH Johanneum in Graz, Austria strung together a pile of Arduinos
to create a chain reaction of unbelievably geeky proportions. Seriously, you just need to watch the video -- you know you're in for a treat when you get Homer Simpson, Darth Vader and Hello Kitty in under one minute. Don't waste any more time here, hit that read more link and watch more Arduino's than you can shake a stick at work in tandem.