From the outside look and the screenshots (because that's all Dustin showed you) it's a simple design and that's the point; it was never supposed to be a complex work of design for you to be proud that you could replicate it in 1 day in rails. Yeah, Dustin put some work into thinking what could work for the layout but once the application of the design is done, replication is beyond simple.
Clone all you want I think it's great but Dustin was really telling the story of the "network" the idea of a closely knit community of writers (pseudo-writers whichever you prefer). I look at it as similar to the Deck Ad network or Dribbble (before every desperate Designer begged for an invite). Or when an HN clone comes along, no one ever migrates across, they always come back here.
Point is, the one thing you are never going to have is the network, that human element that sets apart the clone from the real deal.