Node's most valuable feature is the friendly and colorful community of developers. There are many places where this group congregates on the internet. This page attempts to highlight the best forums.
Official API docs detail the node API.
docs.nodejitsu.com answers many of the common problems people come across.
How To Node has a growing number of useful tutorials.
Stack Overflow node.js tag collects new information every day.
All development takes place at http://github.com/joyent/node. The comments on commit messages are often source of heated discussion regarding core development.
The GitHub Node wiki is full of useful links for newcomers. Don't miss Projects, Applications, and Companies Using Node or the very long list of Node modules, many of which are published in the npm registry.
An Italian Node.js Conference exists as well.
Node Summit is a conference in San Francisco focusing on the adoption of Node in larger companies.
nodejs.org does not maintain any
translations into other languages. However there are
community websites in various languages with mailing lists
and translations of the website.