http.createServe`r

you don't need any explanation? mikeal's written a blog about this, can't find it though:

* http.createServer is worthless if you've never actually created a server
* it is invaluable once you have

this is the canonical example of Node (on nodejs.org homepage) and yet it is incredibly confusing to newcomers, but it should be made clear why this is so incredible: the web server, HTTP and the thing most JS developers do day-to-day is no longer a mystery — the "java guys" don't need to write an API end point for you, _you can do it_!.