Somebody, somewhere wasn't thinking when they came up with this one. However if you can keep them cool, own a power station and you have a board with a lot of PCIe slots........
http://www.anandtech.com/show/3731/news-a-single-slot-gtx-470-from-galaxy
http://www.anandtech.com/show/3731/news-a-single-slot-gtx-470-from-galaxy