Arrowhead has something similiar, but it can support your weight for use as a chair. I just ordered one myself.
I have two - one for each of my Claytors. Works fine - I had been using a homemade gear hammock a la Jeff. The eno's are just a bit more convenient because of the adjustable ropes, although I suppose I could have used a whoppie on the homemade to acheive the same thing.