I just found this link on Slashdot. I think this is a great idea, we should all start living like hobbits. The issues I see with building a hobbit hole are with laying the pipes themselves. At least, the way I see it is that you would have to dig up the entire slope you wanted your house in, lay the house down, and re-pack the earth around the house. Somehow I think that this would be a lot bigger construction project than a normal home. And I think it would be a lot less eco-friendly. But still, very cool. I want to see somebody really do this.
In a different yet related subject, I was trying to think of something to do this week that wasn’t writing, because I need to have some other project that uses a different part of my brain that writing does. So earlier I had decided to design myself a house, just for the hell of it, so I will design myself a hobbit hole.