FOAF Vocabulary Specification

I think it's a great format. I like the way the possible roles/relationships are mapped out, and I do plan to implement part of it in my project.

I stumbled over this whilst trying to work out what this tag in my WordPress theme meant:

      <link rel="profile" href="http://gmpg.org/xfn/11">

Does anyone actually use FOAF or XFN, and if so why?

Nice!