Marion Nestle has a blog!
She is a prominent US dietitian and i read her book 'What to eat' last december..(perhaps it should be called 'what NOT to eat'...
very informative..somewhat scary but not as scary as Jane Goodall's 'Harvest for Hope'..
after reading these sort of books, i always have the impulse to become vegan, or if not, vegetarian...or at the very very least, eat less meat...)
Still, don't let me scare you off in becoming a more conscious consumer...
this website is also very interesting...featured on Bloggers 'Blogs of Note' recently. Yoni Freedhoff's 'Weighty matters'.
Have fun browsing!!