Hi,
I attended the DrupalCon 2008 Boston last week.
Drupal (as probably most of you know) is one of the leading Free
Software content management systems.
Drupal 6.0 was recently released, and over 900 committers contributed
to the release (including doc, etc.).
I have set out to fulfill the GraphSync challenge using Drupal.
http://www.dataportability.org/graphsync/
The GraphSync challenge is a portion of what I would call an "Identity
Aggregation and Management System."
By implementing on Drupal, I hope to make this solution widely
available for people to run themselves (as opposed to using yet
another service that you don't control).
I noticed that there was a FOAF (Friend of a Friend) module for Drupal
that had fallen out of maintenance (and was two major versions
behind), so I picked that up as my first project.
I will keep this list updated as my work on Identity Aggregation and
Management matures.
Stephen