Finally, wrote up an article on Vitamin D.
http://www.eatmoveimprove.com/2009/1...-at-vitamin-d/
I include most of the links provided here by Garrett and others and incorporate them into this article, so if you were going to search and browse through most of them you can find them all here.
Plus, I have some interesting analysis I think you may enjoy in the 4th section.
