Here is a link to an article that I found through the Oregonian's archive from November 2008: http://www.oregonlive.com/health/index.ssf/2008/11/living_in_a_food_desert.html
I found this article particularly interesing because it hit close to home. Portland is suppose to be such a green city and I personally have always had access to grocery stores and assumed that everyone in Portland and its surrounding areas did as well. We live in Portland, not a small southern OR town.
--posted by Maria David