Drupal Voices 104: Tim O'Reilly on Drupal and the Internet Operating System | Lullabot
O'Reilly says that "Drupal is clearly becoming one of the largest and most important open source projects" due to the size of the community around it. He sees the that Drupal has been able to foster a "wonderful participatory community" by creating a context in which other people can contribute.
Source: www.lullabot.com