Ugh. They changed things. I don't like disqus, but can't switch back without losing my comments.
So here is how to comment as a guest with disqus:
1)write your comment,
2) click name and there is a box that you can check that says I would rather post as a guest. It then changes to name and email. If you don't want to put your email, you can make one up
For those who like pictures: