Hi Mike,
Welcome to the forums.
Nice site. Very simple and non-cluttered.
I like your buttons, but the method of highlighting the current choice seems to sit a bit funnily with the rest of the page. I'd probably be inclined to use something a little more subtle. eg. Changing the text box in some way, or something along those lines.
You might want to consider providing your CV in HTML format for web browsing, as I think only IE users can view word docs in the browser window.
When opening new windows from the projects window etc, consider opening just one named window using <a href="..." target="winname">.
Keep up the good work

Cat
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http://web.soothed.com.au/
Web design for natural therapists