http://well.blogs.nytimes.com/2008/04/18/strategic-spending-on-organic-foods/Comment #19 is exactly the kind of thing that keeps me buying food at the supermarket.
Also, I roll my eyes at the posters asserting that organic food is more nutritious--it is NOT proven, and there's a lot of variables that have to do with other aspects of farming practice (for example, soil nutrients and fertility vary from place to place--I remember reading about how the Australian wheatbelt is practically nutrient free). And as always, "non-organic" covers a huge range of practices and not all non-organic produce is identical or factory farmed.