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?
I already have too many profiles on too many sites. Gravatar integration would be a simple way for me to make it easier to manage that.
I'd second this and request that Jive SBS add a feature to function as an Avatar server. Gravatar URLs would be a suggested URL pattern. A prefix, a hash of the email address, and optional parameters to specify size would be the basic requirement.
Our use case is that we have other applications in house that can use an external Avatar server and we'd like to use Jive. One example is here: http://confluence.atlassian.com/display/FISHEYE/Configuring+Avatar+Settings