But he's actually not knowledgeable or good at what he does -- if you view his Github page, you'll see that his projects are 100-line thefts or wrappers around other people's work.
He's been a major drain/drag on the Node.js community, and makes the IRC channel a toxic wasteland for a good part of the day.
He trolls other sites as well... http://www.youtube.com/watch?v=IrkDqh9ZVog