Very nice. Are you using a variation of the Arc90 readability algorithm or something else? Aha I just saw you talk about them in your "about" page. I was going to do something similar with the python readability port[1] and Flask but hadn't got around to it. I am glad someone did, and did it far more impressively than I could have.
Thanks! I took Readability and ported it over to C#. It's not an exact port as I don't have the DOM and some features of JavaScript in C#. It's using the same algorithm for most of it.
I did other things too, such as making RSS fees contain the full article, pull text from PDFs, rewrite links back through the reader...