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Love the design - very attractive and nice to look at. Really like the colors and graphics used. Layout is very clean and intuitive.
Here's two thoughts for usability:
1) I would definitely get a call to action - a button of some sort - into that main content area directly under the header.
2) Consider adding hover effects to the main nav other than those small triangles that appear, like a slight color change, maybe just even a lighter shade of the same color.
I'd say you hit a line drive on this one overall. Good work!

btw, I like the sunburst center aligned.