Hello Scott,
Great selection with the founder of Duolingo. I’ve used the app myself and have found it to be an enjoyable way to brush up on my deplorable French. I had a browse around for Luis von Ahn and noticed that, as a child, he spent a lot of his time playing video games. I wonder if this passion for gaming influenced him, at all, while he was creating the app. Can we expect to see changes that move Duolingo more into the realm of gamificiation?