Get people to know to comment. Right now you are falling prey to the empty restaurant effect. There's a cognitive barrier to be the first/only person to comment

Get people to know to comment. Right now you are falling prey to the empty restaurant effect. There's a cognitive barrier to be the first/only person to comment on a site that is perceived to be empty. So have some friends of yours comment as a favor to you, and other people will start. This little site that I run (http://impishidea.com/ http://impishidea.com/) has only somewhat higher traffic than you currently, but gets a lot more comments. The "8 new comments today." counter was a big help, because people were able to see evidence of new comments.