These "Acrylic Cowboy" cases spill the guts of your PC to the world, making it easy to get at your computer's parts and watch it explode when you splash some soda onto it. They're about $100 apiece in Japan, but there's no North American importer at the moment.
I actually love them. I'd need to keep a can of compressed air at the ready at all times, but there's something very hot rod about the whole thing. "Cowboy" is totally right on — these machines ride bareback.
And considering my gaming PC just died a mysterious death last night, portending many angry evenings of troubleshooting, it's not hard to get wistful about how easy it'd be to swap cards in and out if I were running in one of these cases.