This is good idea:

A gravatar, or globally recognized avatar, is quite simply an 80×80 pixel avatar image that follows you from weblog to weblog appearing beside your name when you comment on gravatar enabled sites. Avatars help identify your posts on web forums, so why not on weblogs?

Cool concept. It ties the image to the email address when you comment.
Plug-ins for MovableType, WordPress and others.

Leave a Reply

Your email address will not be published. Required fields are marked *