OK, I've had several complaints on not being able to comment. Yes, you do have to set up a profile first. But it only takes like a minute.

1. Click on the "comments" on the post you'd like to comment on.
2. Click on Post A Comment.
3. Now, if you don't HAVE a user name/password at blogspot.com you will have to make one first. So scroll down under "No Blogger Account?" until you see the blue box that says "Get One Now". Click on that and fill out the five boxes, being sure to follow the directions at right.
4. Make sure to check "I accept the Terms of Service".
5. Click "Continue"

Then when you want to comment AGAIN, you can do so with the user name and password you just created.

Let me know if you have further problems.