Gravatar
I didn't even realize that this blog/CMS system (Graffiti) supports Gravatar. Thanks to Bill Brown for alerting me to this.
If you don't know what Gravatar is then in as few words as possible: You upload an avatar to the Gravatar site and it becomes associated with your email address. If you put your email address in the email field in a comment to a blog that supports Gravatar then the blog will link your image directly from Gravatar otherwise it retrieves a unique pattern from Gravatar for your email address.
I remember reading about this on Jeff Atwood's Coding Horror blog but didn't even realize that I had it on here until I saw Bill's face popup next to his comment.
Filed under: web