I really like Pop Sci's podcast series, the latest is an interview with the maker of an awesome homemade Zamboni, Jonathan Coulton writes -

"Inventor Damian Renzello has been making portable skating rinks and related accessories for years, so it's not surprising that it's come to this: a homemade super zamboni that blows snow, shaves ice, and looks totally awesome. I love projects like this - the false starts, the dangerous accidents, the madness - I think those are the three ingredients that make up what they call "Yankee Ingenuity." I was a little disappointed to find out this wasn't a meaningless, self-destructive quest for a personal homemade zamboni, and instead the latest invention from a genuine entrepreneur. I should have known from the photo--it's far too well built to have been cobbled together by a crazy person." - Link.