The most important source of support is the NetBSD community itself. The community section lists various resources on where to get help in case you encounter any problems.
There are also a number of consultants for hire in case you need commercial support.
In case you need to know if a certain piece of hardware is supported by NetBSD, check the list of supported hardware devices.
Found a bug? Please let us know.
Before submitting a report, please search the PR database to check if a report already exists for the issue.
Didn't find what you were looking for? NetBSD search offers various methods to help you find it.
NetBSD's security details and advisories can be found via the Security and NetBSD page.
pkgsrc.se is an easily navigated frontend to pkgsrc. It tracks changes and updates to pkgsrc and pkgsrc-wip. The site also provides a "package tracker" (for email notification about package-specific changes), statistics about pkgsrc, and RSS feeds. It is the "all about pkgsrc" service!
NetBSD Planet is the syndication of various NetBSD-related newsfeeds, blogs, etc.