Comment Moderation
Spammers have become more and more of a problem lately. To combat them, I have turned on comment moderation for now. All this means is that when you submit a comment, it won't show up on the site quite as quickly as before. I'll get an email and then go in and manually approve your comment. At that point it will show up on the site.
You can get around the moderation by creating a user on the site (use the Join/Sign In buttons in the top right of the page.) Moderation is only turned on for anonymous comments.
If none of this makes any sense, just keep making comments the way you used to do it. Don't be alarmed if they don't show up on the site for a few hours.