Good info on the Magento history with lots of the historic milestones of the development, and Magento 2 and where it "came from". Although I think you skipped X Commerce split, this would have made a nice addition there.
The info on magento 2 was great. It was good to see a simple module in play and the new directory structure for extensions. Not having a framework that it falls back on is a bit of a shock, but it could be that this is actually a good thing, as frameworks add bulk.
Great talk on rolling your own encryption. Speaker did a good job on a tough subject and I was able to take away a lot of good info about encryption with PHP. The code samples were easy to follow and I walked away feeling like I understood the shared key encryption scheme he described.
Good coverage of xdebug, with install process and setup, and a very good live demo. This talk covered the basics of how to use it, and even as a long term xdebug user I picked up a thing or two I did not know.
Lots of great info in this talk. Tons of stats on a bunch of the large hacks. Good take aways, and ways to improve security.
I learned a lot in this talk, and look forward to actioning some of this info in security practices at work.