I took a look at your site, and it looks pretty good so far. I think you have a lot of really great content and a really powerful message. Depending on what you want your site to be, I might make a couple of different suggestions. I think it would be a waste if you couldn`t get your message out there, since it is so stong. I have a background in website optimization and marketing, so forgive me if I am overly critical. If you are planning on updating your site frequently, and adding a good bit of information to it on a regular basis, you may want to think about taking the site in a different direction via a WordPress Blog (wordpress.org). You can do lots of customization, and even make the a WP Blog, look like a regular site. The reason I suggest this, is that it has a system to allow you to add content to your site quickly and easily without having to build new pages for every new topic. There is also a very active community, with lots of information to help you get started, and it is all free.
If you aren`t planning on updating very often, I would make the text in your navigation either bold or a larger font so that they can be read more easily. As far as the main content, you may want to think about using another color or font for the text to make it stand out more. As of now, it blends together and can get difficult to read. If you have any more questions, I can try and help with those. Good luck, and good work so far.