Looks very professional!

Not sure if you're asking for crits or what, but I have a few minor comments on your website:
1) On the Overview page there's a spurious clicky around the lines "of an entire world. Whether", "good, or the side of evil" which if clicked gives a 404.
2) When you click on the concept art it opens in a window that's way too small (like 100x100 pixels) and is non-resizable.
3) This might be a personal/aesthetic thing, but the page-flippy effect is annoying when flipping across multiple pages because they go one at a time so it takes a couple seconds.

Edit: BTW, I'm using FireFox if that makes any difference...