I didn't end up doing the Web Assembly talk in the end. I had the bones, but I didn't want to deliver a half baked talk. I'm fairly pleased with the start of my series of talks that will go from no knowledge of Rust (January) and by end you'll know how to write an Operating System (December).
Here's a secret I'd like to share with everyone... I've never written an Operating System! So it's going to be a voyage of discover for all of us!