Does the link to scribd not work (such links are inserted in brackets whenever HN detects a story going to a pdf)? It doesn't give you the pdf, so you have to read it in the browser, but it seems perfectly functional otherwise.
That's odd. It's not as readable as the PDF for me (under Chrome 12 and Windows 7), but it's still legible. Maybe you should send a bug report to the people at scribd? Or at least tell them that some files are unreadable in your browser/os combination.