Ok, I finally have some pictures of this thing in action. I have now slept in it a handfull of time and I must say they have being some of the best sleeps of my life. I have found it is much better with a thermarest on top of the canvas, it helps distribute the weight a little better.
I have slept with two and it works pretty well. Definatly wouldn't want it do it with someone you didn't want to be close to as you tend to slide together. (on this preticular trip I didn't mind at all)