Here is a link to the recording of the presentation I delivered this week at the Responsive Web Design meetup in New York. I was going through the responsive demos and tools I worked on the past few weeks. Take a look at my first blog post on the topic for more technical details.
Here is the slide deck for references to the links I used.
As I'm not a super experienced web designer, if you have feedback about any of this material, I would love to hear it, thanks!