What is a gravatar?
A gravatar, or globally recognized avatar, is quite simply an image that follows you from site to site appearing beside your name when you do things. Avatars help identify your posts on blogs and web forums, so why not on any site?
How do I get a gravatar?
Signing up for a gravatar.com account is FREE, and all that’s required is your email address. Once you’ve signed up you can upload your avatar image and soon after you’ll start seeing it on gravatar enabled sites!
How do I get gravatars on my site?
Setting up gravatars on your site is easy, you don’t even need an account! Plugins are available for leading blog software and content management systems, and our tutorials will have you running gravatars in no time. To request a gravatar from our servers, you simply add an image to your users activity with an “src” attribute that points to our gravatar image generator and includes an MD5 hash of the user’s email address. Since all gravatars are rated with an MPAA style rating, you can restrict your site to show only gravatars whose content you are comfortable with.
link: http://www.gravatar.com/
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