I woul'd like to know your opinion about one of my recent works. At the first place, I'm interested in layout comments, but and everything else. It's not finished yet, but what's finished? :)
A nice subtle patterned background on the html element would look lovely. I like the blue but in the header/footer I'm not a fan of the margin separating it from the border. Push it together - make it solid.
I think you will have to add a clear: right; on your ul#menu too (or else it won't be "inside" the div#header) but I'm not sure since it's late and I'm tired. But just add, clear: right;, if it gives you that problem.
This should work, although untested but I'm confident =P, and it the correct way to do something like that. It reduces images although you used CSS sliding doors, which would be the correct way to do something like this since you avoid "the flash". You also cut down your divisions by two.
I would recommend not having the lower box (".contentright" & ".contentleft") a fixed height (500px). When you increase the font size (even one size) the text starts vanishing behind the footer.
Otherwise, I like the site, the blue you chose is very refreshing.