It was brought to my attention that there is a little confusion on how to complete the process. Here is how it works: first, click on the red underlined word 'Comment' at the end of each blog. Second, write your comment. OK, thats the easy part. Now, before you can 'publish your comment' you have to choose an identity. There are three choices, I recommend the second option, 'Name/URL.' Type your name and then you will be able to publish. If you want to keep it anonymous than that option exists too.
I reply to the questions, so check the 'comments' again after a day or two for a response.
Thanks,
Justus