Say whatever you want to in the comments to this post -- random, off topic thoughts, ideas, suggestions, questions, recommendations, criticisms (which can be anonymous), surveys, introductions if you have never commented before, personal news, self-promotion, requests to be added to the blog roll and so on. If a week goes by and I have failed to add you to the blog roll TELL ME TO DO IT AGAIN, and KEEP TELLING ME UNTIL IT GETS DONE. I can be lazy about updating the non-post parts of this site.
ALSO. You can use this space to re-ask me questions you asked me before that I failed to answer because I was too busy (but now might not be). That is often the reason I fail to get back to people, and on a blog, after a few days, the comments thread dies and I just kind of forget about it. Let's use this space to fix that, because it does need to be fixed; I look like a jackass sometimes, leaving people hanging. I will TRY to respond to any questions here.
AND you can use this space to comment on posts that are old enough that no one is reading the comments threads anymore. For example, if you thought of a great quote for the great quote commonplace book, but now no one is reading that, you could put it here.
You do not have to have a blogger account or gmail account to post a comment -- you can write a comment, write your name at the bottom of your comment like an e mail, and then post using the "anonymous" option.