Hacker News Reader

I'm curious to know what they're doing on the back end beyond the fact they're using Amazon to host the infrastructure.

They running some version of arc90's readability to extract articles and display them nicely. http://twitter.com/arc90/status/19079131365

I developed a RESTful API that runs Readability on the server. It's currently private, but with enough developer interest I may open it up.