Chiron is the Teacher of Heros and Heroines. It's a PHP based multi-user, multi-sources, multi-output, multi-cms News-Reader and Cross-Site-Networking Tool. It currently provides one-code-base-fits-all Integration for Wordpress. Drupal will follow soon, hopefully.
Find out more about the mythical Centaur.
Chiron makes heavy use of Simple-Pie. Many thanks to all the Contributors over there.
Chiron was first built to be used within the lovely Wordpress. If you're not familiar with it, got and try it yourself!
Chiron is also available for the mighty mighty Drupal. Check it out, if you're looking for some serious CMS-Stuff.