Long term Drupal developer Jeff Eaton continues to inspire and as a result, Zappos started using Drupal on http://about.zappos.com. Zappos.com is an e-commerce website with more than $1 billion in revenue, and well known for their legendary customer service and culture.
At the end of 2007 we implemented blogs.zappos.com using Jive's Clearspace software. We considered using Clearspace to be our CMS of choice but by early 2008 the absence of certain features and other issues made us consider other options. We had a front-end developer working on adding more blogs to blogs.zappos.com and a new hire, Geoff, who we assigned to about.zappos.com. The idea was to let each work on their projects and occasionally switch places and work on the other CMS so they could compare and contrast the features and development time. Drupal ended up being superior in terms of templating and development as well as adding new features and ease of use for the end user.