Developer Evangelists are a scarce resource that are commonly not self-identified. They are uniquely motivated to elevate technologies, empower communities, and generate massive web visits, leads, and opportunities. The document discusses personality types and how they relate to software development and developer evangelism. It also outlines some archetypes of developer evangelists, such as the zealot, professor, and social maven, as well as an anti-archetype of the tech trendster.