Suggestions for new topics

The goal of this post is to be used as a way for you to provide suggestions for introductory driver-related topics that you would like more information about. I would like to hear any suggestions that an new driver developer might have and I'll try to gather information and provide a useful analysis. So, feel free to write a comment and suggest any interesting relative topic that you might think about. Please keep in mind, though, that my main area of focus is UMDF :)