On the day, I think I was probably the only designer there. I think it's important that any good designer understands the wider technologies and technicalities that the development team works with and is therefore able communicate with and be briefed by a developer in the developer's terms, terminology, and language. This makes it easier for designers to understand the limitations in the relationship between design and functionality on the web.
The two speakers that really stood out for me on the day were Chris Haseman (@haseman), Lead Android Developer at www.tumblr.com, and Zach Holman (@holman), Lead Developer at GitHub. They were both confident speakers with fun personalities, who didn't dwell on technical details and focused on ideas and concepts instead.
I thought it would be worth sharing some of our learning. You can find the slides to their presentations below: