I made a few changes to the way comments work on the site, not that many people leave comments though. 🙂  In an effort to help prevent Spam comments from getting added to old posts, in addition to the spam software running on the back end, I have decided to close comments on posts older than 14 days. This means that if a post was published more than 14 days in the past the ability to comment on that post will be turned off. In addition I have enabled the use of Gravatar’s for comments, this will allow for people’s gravatars to be displayed if they leave a comment using there gravatar address. Additionally I have enabled nested comments in the event that one commenter replies to another. These changes were also retroactive and have gone back and been applied to all comments on the site. A good post to view to see all of these changes is this one.