Today I discovered that I had a form of comment moderation turned on on the blog without knowing it. And, as a result, I never went to the moderation page to check out posted comments, and no comments anyone posted showed up on the blog! Bummer!
I now have moderated all the previous posts.
I tweeked the settings today and that should not be a problem anymore. Please feel free to comment on my posts. Ask questions, and I'll see if I can answer them.