Dries is the founder and project lead of Drupal and co-founder of Acquia and Mollom.
The company behind DivX, one of the world's most popular video technologies, is using Drupal at http://labs.divx.com/.
People might be interested in this too: http://del.icio.us/tag/yetanotherdrupalsite
I have tagged all the drupal sites I found out there with drupal and users. I think we can collect quite a bit of drupal sites this way.
More information about text formats