I really can't find beautiful node.js tutorials. If you know any tutorials (especially video tutorials) please share. I can't use offical node.js api documents to hierarchy.
1 tutorial from me for beginners: http://net.tutsplus.com/tutorials/javascript-ajax/node-js-for-beginners/
Good to get you to know what node is from Ryan Dahl the creator:
http://www.youtube.com/watch?v=jo_B4LTHi3I
http://www.youtube.com/watch?v=F6k8lTrAE2g
Build a basic web server - not necessarily practical code but important to understand what node is:
Critical to grasp the event loop - especially "everything runs in parallel except your code". If you don't understand that quote, you don't undertand node:
http://blog.mixu.net/2011/02/01/understanding-the-node-js-event-loop/
Once you get past that, getting to know some useful frameworks like express:
http://expressjs.com/ & http://expressjs.com/guide.html
Node videos:
I found this book helpful when starting: