Here's the Feb. 13 podcast of Scientific American.
Fat Chance: Do Dietary Guidelines Actually Contribute to Obesity?
Paul Marantz criticizes the dietary guidelines to reduce dietary fat, as well as the standard practice of treating markers for disease (cholesterol levels, blood pressure) rather than the diseases themselves. Here's he's interviewed by Steve Mirsky in the weekly podcast, Science Talk.
The link above will take you to a written transcript, as well as a link to the audio podcast.
Thanks for laughingW on the Protein Power forum for mentioning it in this thread about whole grains.