What is a gravatar?
Let’s take it from the source:
A gravatar, or globally recognized avatar, is quite simply an 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?
From a community members point of view, what’s cool about gravatars is that you don’t have to upload your avatar image on every blog, forum or community that you are a member of. And from the community owner’s point of view, you can now add a little pizazz to your blog or forum with your members gravatars.
You can read more about gravatars in the magazine.