As you can see, (unless you’re reading this in the archives and I screwed something up since) I have gravatars enabled. How this works is, you go to gravatar.com, register your email address, upload a photo to use as a blog avatar, and whenever you post a comment, include your email address. Assuming the site - like this one - has it enabled, your photo will be fetched and included with the post. Cool, huh?