[via Facebook]
Jason Lentz has an amazing cardboard robot costume, and frequents events like Burning man and the recent Maker Fair in SF. He has quite a collection of robot suit iterations in his Flickr page, and if you're feeling envious, you can buy one of his robot arms on Etsy for a mere $85 USD or attempt to make your own with his provided schematics. You can also check out Jason's fan page on Facebook.
[Via io9 via Make]