Very tasteful, crisp, informational and effective design. It's fun to navigate the site.

I don't agree with Acorn that you should add more green banding wrap-arounds but agree with him that the animations should work only once.

I would leave out the next/previous buttons altogether.

It seems good advice to add a mobile variant at some point but the site actually works quite well on my Samsung.

Upon clicking the email buttons/link, I would have the email client open in a new page/tab so as not to move the visitor away from you website. Also: those who have webmail often don't have their browser set to handle a mailto link; they will just get an empty page or error message.