It's funny, 2 of my biggest interests lately have been RP/Liberty and Primal eating/lifestyle. Looks like Tom Woods is bringing the 2 together as well!
The diet is basically Paleo style, eliminating grains and processed carbs, and embracing vegetables and high fat/protein animal foods. I just finished reading the book, and the science is very solid. It is based in evolutionary biology and working with your hormones, not against them. Also, the takes on exercise and lifestyle are great and scientifically sound.
Any other Primal folks here on RPF?