FOAF: Friend Of A Friend

The Friend of a Friend (FOAF) project is about creating a Web of machine-readable homepages describing people, the links between them and the things they create and do.
It's not what you know, it's who you know. Ever since the Web started, it's been as much about self-expression as anything else. Many people's initial forays into the Web consisted of building themselves a home page. Search engines meant you could find people with similar interests pretty quickly. The technology was interesting, yes, but people themselves always prove more interesting.
More at http://www.foaf-project.org/.

Create your own FOAF file.