Just a quick note to explain how comment posting works, because it wasn't very intuitive in the new templates.
You don't need to sign in to post a comment. You can just fill in the name, email address (optional) and URL (optional) fields in the comment form and post that way. But your post may go into a moderation queue and have to be manually approved (this is not currently the case, but I'm keeping the possibility open in the future if there's a spamment problem).
Alternatively, you can click the 'Sign in' link above the comment form, and authenticate using credentials from LiveJournal, Vox, TypeKey, or any OpenID provider (including AOL, Blogger, Yahoo/Flickr, or WordPress). Chances are that you already have at least one of these accounts. Authentication's handled by the originating services in all of these cases, so you don't need to worry about my security setup.
The advantage to signing in is that if you're authenticated, I can then approve you as a trusted commenter, and your future comments will skip any moderation queue.
I've changed the wording on the comment form and hopefully that should clear it up.
This is a comment. Oh yeah.
Jumping Jillickers Batman! It's a comment!
Testing, testing. This thing on?