Resources

Express tutorials

http://expressjs.com/guide.html

http://www.hacksparrow.com/express-js-tutorial.html

Collection of resources for node

http://nodejs.org

https://npmjs.org/

http://www.nodebeginner.org/

https://github.com/felixge/node-style-guide

http://howtonode.org/

http://www.hacksparrow.com/

http://nodetuts.com/

http://javascriptweekly.com/

https://github.com/mozilla/awsbox

Podcast

http://nodeup.com/

Books

Node: Up and Running (not a referral link!)

IRC

#node.js on Freenode

Twitter

People who talk about node often and are involved in node core or write modules, etc - just a handful, follow these and you'll get a feel for who they're conversing with that you should also follow