You realize Lulu(which Tom used for the ebook) offers pretty much the same service? On-demand prints of books.
Both of these still have a bit of cost involved since you need to order a test copy of the book for approval etc. Also time issues since you need to rework the layout from the ebook version a bit and other stuff like that.
Still, I think this would sell a few more copies, and since it's on Lulu already...