>Nevertheless, this is a cool idea. I'd love to see one for Paul Graham's essays (including those written after Hackers and Painters was published)

Some fellow HNers, dy and icco I believe, recently put together pg's essays in ePub and Mobi format. They're posted on Github: https://github.com/davidyang/Paul-Graham-s-Essays-Epub and the HN discussion is http://news.ycombinator.com/item?id=2443377