I’ve just added the Gravatar plugin to my WordPress install, allowing Gravatars to be displayed for comments.

Gravatars are “globally gecognized avatars” associated with an email address. The idea is that you can upload a small avatar (picture), and any site on which you post which supports them will be able to show that picture.

I found out about them from search.cpan.org which now supports them, and Andy Hexten produced a page showing gravatars of CPAN contributors (I’ve only just created one for my @cpan.org address, so I’m not on there yet).