Here's a simple yes effective video slideshow that shows some of the sites built using the Drupal framework as of June 04, 2008. Thank you Drupalist, and YouTube for the video.

Corporate Sites Using Drupal

Nike (Beijing Olympics site), FedEx, AOL,

Publishing with Drupal

Fast Company, Forbes, France24, the Onion,

Drupal in Politics

Greenpeace, Hillary Clinton 2008, Mike Bloomberg, MotoGP, Belgian Prime Minister, Belgian government, the New Zealand Gov.,

Drupal in Music

Warner Bros Records, REM, Bob Dylan, Metallica, MTV UK,

Drupal on Campus

Universities, student groups, parent groups and local schools use it to keep in contact.