The site has an easter egg. Keyboard navigation: Try j,k,Esc,1-7 (its explained at the bottom of the page)
The keyboard nav isn't really an easter egg. HINT: The site does have two easter eggs. I'll spoil one; try clicking in the far top left of the guilloche background. Didn't you wonder how we got the page to load so fast with such a huge image?
Try typing <script into one of the signup fields for the real easter egg!