Gravatar, the extremely popular globally recognized avatar system is back online after been down for months, and causing some users to think it might have died a silent web death.

Registration is now open for the new 2.0 Public Beta. Previously registered members don’t need to sign up for a new account and can continue using their existing login details.

For those who don’t know what Gravatar does, it simply allows you to upload an 80×80 pixel avatar image to your account. When you post a comment on Gravatar enabled sites or blogs, the avatar will automatically show up without you having to complete any further steps.

What kind of image do you use as your global avatar, or do you have separate ones for different sites and forums?