I presented at EmberConf 2015 last week! Not only was it my first time speaking, but also the first conference I have attended. I couldn't imagine a better or more exciting developer community. The talks were great, and nearly everyone went out of their way to be friendly and inclusive.
Here's the video:
Part of the presentation included a demo, for which the code is on GitHub. I also heavily rely on a paper by Hadley Wickham called “A layered grammar of graphics” It’s available here and is fantastic.