I thought about doing something like gravatar, but it’s not well-used among my social or professional circles, either, outside of a few forums. Still, I’d be interested in seeing what you did. I think it’d be neat to have ‘gravatarfs’, which you could mount (or not) under /lib/face, and have it construct the .dict and face files as needed. No changes to faces needed, anything which know how to look through that tree already benefits.
Anthony