The design is great. Simple yet effective and pleasing to the eye. All I'd suggest is that you refine your AdSense ad placement. Try moving the ad unit towards the top of the page (perhaps replacing the banner ad that is just under the header?). You should see an increased CTR.
Great looking site, I will certainly come back since I am a hack when it comes to design. I think you could improve your seo rankings by using the H1 tag for key phrases. Otherwise, it looks tip-top
Righteo these things will all be added to the new design we have created. I will keep you posted on when we can get the design up.