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I like the site overall, and I think its a nice clean concept.
In the about section maybe you could put the pictures on top, followed by the text, just my personal preference like to see the pics first before I read the text.
I also like Luke's idea of re introducing the green color. You have probably already thought of this but you could reuse it in your footer and make more extensive use of that section.
Here's a link to a post a I tend to go back to when I am looking for new ideas on footers.
http://www.smashingmagazine.com/2008/04/08/footers-in-modern-web-design-creative-examples-and-ideas/
and
http://www.smashingmagazine.com/2009/06/17/informative-and-usable-footers-in-web-design/
hope it helps

Thanks Yasmin, I would see how I can reintroduce green color. Most probably in project section.