A set of scraped comments, indexed to get the English terms.  This is basically the same stuff I used in the 'Similar Hacker News Users' tool from a couple of weeks ago:<p><a href="http://news.ycombinator.com/item?id=1046301" rel="nofollow">http://news.ycombinator.com/item?id=1046301</a><p>Except now it is user -&#62; personalized list of submissions, instead of user -&#62; similar users