Great design, simple, right to the point, yslow give you a note of "B", wich is pretty good
Optimise your images!!!!!!!!!! Seriously, your site is 34.8mb, the normal user will take forever to load this page, and most of the time, will simply close the window before the site finish to load. Resize your image in photoshop, and optimise them for the web.
The menu need more work. The links move when I put the mouse on them, so I cannot click on it fast, the tooltip sometime doesn't show completly, the is no reasy for the tooltip anyway... and it make the whole site move them I move over the menu, so I'm distracted from the menu.