I keep looking at various pictures of this charming contraption and thinking, "I've got to get one of those made." I tried one out once at a leather conference a couple of years ago, and it's quite the experience. The even, constant pressure all over your body - it's like being underwater. And you really can't move, either. It's trippy.
So one of my projects over the next few months is to talk to a local latex clothes designer and see if she can get me the rubber required. Then it's just a matter of getting her and my carpenter together to fit it to a frame. A specialty toy, to be sure, but I have to surprise my boys on a regular basis or they'll get complacent.