After having used Pligg for quite some time and frustrated with its limitations that only Drupal could meet (like, being able to post blogs, videos, stories, custom content type) to the website, I have started a project called Drupaligg (Digg clone using Drupal) and am releasing its first source code compiled and integrated with all required modules and interface. This is still a testing verison, but should work without much trouble.
The demo is available at:
The code and the details can be found at:
Drupaligg: The Open Source Digg/Reddit Clone using PHP based Drupal
Please check out. And do not forget to contribute to the development of the software making it more feature rich and competitive than Pligg using the power of Drupal.