I was very fortunate to be able to speak at the first OpenVis Conf in Boston in April 2013.
The speakers were wonderful. The organizers were graceful. The venue was delightful.
The talk was recorded, and can be found on Youtube:
Use the arrow keys on your keyboard to navigate. Each slide is its own html page. The source is all on github
I also put the slides on speaker deck for easy viewing:
It was a great time, and again, I feel very honored and humbled to have been part of OpenVis Conf.