It's more of a link than a discussion, but there's a really good article on nutrition in the New York Times by Michael Pollan. I'm waiting for The Omnivore's Dilemma to come out in paperback; anybody read it?
Link to the article here.
I'd ask for thread starting permission, but historically I'm not much of a thread starter, so I guess if I have anything I'll just bring it up when the time comes.
EDIT: I second fnord on investment discussions. This is something that doesn't really concern me now, but I'd like to start learning about it before it does concern me in a couple of years.