I agree that your navigation is good. The design isn't all that bad. It's clean and simple, which can be refreshing from all the other sites that have so much #$%&* that you can't find anything.
I'm certainly no graphic designer, but my only immediate thought on your current design is that when your navigation menu expands to the right and covers text (i.e. Past Websites), you should use a different background color for the nav box because white on white is difficult to see...it makes your navigation text get lost in the content it is hovering over.
I'll go back to my glass house now. :-)
William Eaton, MCSE
iTech Computer Solutions, LLC
www.itechcs.com