The Omega Drupal 7 Base Theme is a highly configurable HTML5/960 grid base theme that uses built-in media queries to make the site responsive. Each zone (group of regions) can be configured for content first layouts, that resize and rearrange themselves depending on the screen size of the user's device. The presentation will walk-through the theory behind Omega's mobile-first approach, how to use the many configuration options on the theme settings page and pitfalls to avoid. Additional Resources, Tips & Tricks & How-to can be found here: http://www.kendallsdesign.com/blog/omega-theme-responsive-design-resources