My input is minimal and purely cosmetic… I recommend adding height and width attributes to all of your img tags. It might just be me, but I find it slightly irritating when I’ve zeroed in on a section of the page and started reading it, only to have it jump down so much that I have to scroll to find it again… this being caused by the browser using a small placeholder for the image before it knows what size it will be. That can be avoided by using the height and width attributes.
Other than that… it’s a very nice, clean-looking site.