Brilliant. Love buttons that are not rectangular. And the effect is perfect for what you are trying to convey.

Not sure I would have used the font you used for the site header though. It seems very frivolous and light weight compared to the rest of the page. You might want to look further.

I'm currently besotted with a font called Code Pro http://new.myfonts.com/fonts/font-fabric/code-pro/ that I think would be perfect for your header.