As Chuck pointed out, it's not so much the recipe, it's the fact that at least some of it is made at the reconstructed Mt Vernon distillery the old-fashioned way: backbreaking manual labor.
Seeing is believing: http://www.youtube.com/watch?v=x4CGAS8F3SU
Very cool video and thanks for sharing. It changes my opinion on what they were doing. From the label (alone) it appeared that they were selling a recipe. The product is obviously more of an experiment in history, which I can totally dig.