The over all design looks good, it is one that suits the subject in my opinion, and in the end a design that fits the subject is always the best choice.
as for font size I guess it could be a little bigger as leviathon said, especially the navigation menu. However I have no problem at all reading the text, and I am one of those with glasses. I tend to have things in small print on my screen anyways so for me the size seem rather normal (my friends often ask weather i can actually read the stuff on my screen though)
A nice rss button enhances the design, and they are not all to difficult yo make up on your own if you are somewhat used to creating graphics.
I don't really agree with putting search up on nav menu though, unless you are absolutely certain you won't create any more pages to fit in there later on.
I do agree that the design could benefit from being a bit wider, it just seem a little bit squeezed together on my screen, although I don't have a really high res and hardly ever uses full screen in my browser. (my screen is set at 1280x1024, I'd estimate that the browser window normally is sized up to be around 1000 pixels in width)