Drupal Resources
Drupal Theming An Introduction
Responsive Web Design for Drupal, CMS Expo
Don't Design Websites. Design Web SYSTEMS! (UT Austin Drupal Users Group)
Don't Design Websites. Design Web SYSTEMS! (BADCamp 2011)
Don't Design Websites. Design Web SYSTEMS! (DrupalCon London 2011)
Don't Design Websites. Design Web SYSTEMS! (Dallas Drupal Days 2011)
Scalable Drupal infrastructure
Drupal Aware Design: Good Techniques for Better Themes
Html5 coredevsummit
The state of Drupal 8
The DiSo Project and the Open Web