Edit: this site should now support gravatar images, and I recommend going to http://gravatar.com/ and registering a character/image to your email address. This helps identifying people who comment and participate in blogosphere discussions.
I have updated the software running this blog into WordPress 2.5 which brings along some nice, behind the scenes enhancements. One thing that could also show here in the user side is Gravatar support: it adds ‘global avatar’ images next to your comments automatically. But there is still something wrong with this, or I just could not get it to work. I tried editing comments.php with these sets of instructions, but I would only get empty ‘default gravatar’ images: