It’s been around for a while. As off today also featured on the Spiekerblog: proper typefaces instead of system fonts.
Copy is set in Espi Slab Regular, Headlines in Espi Sans Bold, Twitter Feeds in Espi Sans Regular and Bold. Espi is Edenspiekermann’s exclusive version of FF Unit and FF Unit Slab. Done with Typekit.
Marcus Scheller hacked it all together.
You can also see real type in action on the Edenspiekermann site.