Richard Ritter just updated his web site with information about his lightweight ULF (available first as a 7x17, with other, interchangeable sizes available). The updated information discusses the camera and how to buy it. Availability is quite limited, so act early if you're interested.
http://www.lg4mat.net/ will get you there.
I have no financial interest in Richard's camera-making venture. I post this to help him as a good friend. Mostly, I want him to get this ULF stuff off the ground so he can turn to making ultra-light 8x10s and 5x7s, which he has hinted he might do.
You go, boy!