The "www" has nothing to do with it. As a spam mitigation measure, URLs in submissions don't get automatically linked. You need to put the URL in a comment to

The "www" has nothing to do with it. As a spam mitigation measure, URLs in submissions don't get automatically linked. You need to put the URL in a comment to get the link. This is mentioned in various FAQs in and around the site, perhaps most particularly in the FAQ link at the bottom of (nearly) every page: http://ycombinator.com/newsfaq.html http://ycombinator.com/newsfaq.html