That last blog moved me to google a little bit and see what else I could find on Michael Pollan, and I turned up this essay that he wrote in 2007, before he published In Defense of Food. It's twelve pages long, but it covers the gist of much of his book, including some of the guidelines he discusses for eating. In fact, some of it is repeated in the book verbatim.
It's a long essay, but absolutely worth a read if you are interested in your health. Enjoy!