RIACon 2012 website built on Drupal

AboutWeb has built the RIACon 2012 website on top of the Drupal platform again this year. Don't know much about Drupal? Below is an excerpt from Drupal.org:

Drupal is open source software maintained and developed by a community of 630,000+ users and developers. It's distributed under the terms of the GNU General Public License (or "GPL"), which means anyone is free to download it and share it with others. This open development model means that people are constantly working to make sure Drupal is a cutting-edge platform that supports the latest technologies that the Web has to offer. The Drupal project's principles encourage modularity, standards, collaboration, ease-of-use, and more.