I first heard about gravatars about five or six months ago. Idea of having one image shared among many blogs so you can easily recognize the poster is very good. When you publish an image beside your words, you give more strength to those words. While some people are widely known with just a name and the way they sign comments, for the overwhelming majority of people I have a hard time remembering who they are.
If you put an image next to your comments, and you use that image in all places you visit, you increase the possibility of people remembering you and more importantly - remembering what you said. It forces you to think about what you write. Of course you can change the gravatar and try to hide the past, but that’s what wankers do.
So this blog now recognizes gravatars. You can see mine displayed here - yes, that is really me :), in the F1 cockpit, with few pit babes, taken last year in Silverstone. Michelin did a great marketing gig there, and the waiting line to step into the cockpit stayed long throughout the weekend.
Welcome to the limelight.