Several of you have inquired about using an icon/avatar with your comments on this blog. Clif’s Notes uses globally recognized avatars through Gravatar. All you need is an email address and your Gravatar will be be available at this and many other blogs on the Web. Setup takes about 60 seconds and is completely free. Get started here.
Gravatars, Identicons, and You – Stack Overflow
Gravatar’s on AnotherGuy’s Weblog – AnotherGuy’s Weblog