Just to be certain that the comment button actually works: This is a test of the comment button. Feel free to say anything you want - "Nice weather we are having", "How about them 'O's" etc.
It is suppose to work like this; You place your cursor over "0 comments" and click. Type some words in the box, choose an identity (you can be anonymous if you'd like), if there is a box to type in some jumbled code words - be sure to fill that in. Press the "preview" if you want to see what your glorious comments will look like. When satisfied - hit the publish your comment button. There, wasn't that easy?