Right now, deninet is closed to member registration. In other words, no you can't leave a comment.

What's holding this up for the most part is the lack of a OpenID provider implementation for Drupal6. There is some code for this, but it's not ready for prime time. My hope is that when Drupal 7 hits the floor, it's OpenID implementation will have the right feature set. After all, do we really need another login?