Actually it's a very simple custom non-wordpress theme I put together in about an hour, the entire thing built on top of http://roots.cx dynamic content : )

Another note, the share button at the bottom (just pushed a minute ago so hard refresh if it's cached) is from this plugin we put together and have been enjoying so far: https://github.com/carrot/share-button

Glad you enjoyed the article! Let us know if you run into any trouble, happy to help or add debugging techniques etc