Jay-Cee,
Well that is not good news about the warm board, I know one guy that said he used it on a house in Anchorage that he built to sell so no feed back on that install.
I believe that it is like 1 1/8" plywood base so it should make one heck of a solid floor.
well I will have to read that link you sent.
I am guessing a guy could compare the price of that against one of the home built ideas and see how the numbers work out. Just some quick math, if my house is 1,800 sq feet and each sheet is 32 sq feet that equals about 56 sheets at $180/sheet equals $10,000 just in flooring.....wow
I am sure you could easily add 25% for shipping to my location also