Earlier in 2011, the good folks at Lullabot invited us (Zappos) to speak at the Do It With Drupal conference in Brooklyn, New York. They thought it'd be interesting for other Drupal users to see how Zappos uses Drupal and how we got there.
Although I head up the Mobile team now and before that the User Experience team, it was still relevant for me to talk about Drupal because when we first started using Drupal, I was heading up Front-End Development and made the decision to go with Drupal.
Instead of having 1 speaker talk for the super long time of 1 hour and 15 minutes, we opted to split the talk into quarters History & Early evaluation (my part), Technical, Platform Development and Support and have 4 speakers. I think the talk went well and feedback after the conference was positive. Here's the slideshare and link to the video hosted at Drupalize.me (requires a subscription).
Zappos Drupal Case Study Video