my blog contain some informations about medicine and dental technology.. here this URL : http://www.atalacc2008.org/
I would probably not choose the same color for the main body as you have on both sides of it. I think changing the color where you have all your info in the main body would be the best. That way, the text will be easier to read + it will look much nicer. Looks good otherwise.
I like the combination of colors that you used but i think a lighter shade of brown will make the black text more readable. And also make the columns a little bit wider.
I agree with what the guys above say about the colour. Really like the layout. Well done, Good luck with it.