The NXLog Community Edition Reference Manual is available in HTML and PDF formats.
There is a mailing list for users. The list is very low traffic. Please join if you are interested in announcements, would like to discuss nxlog related issues or have questions to ask. Please note that subscription is required to be able to post messages to the mailing list.
You can post questions in the Community Forum.
There is an #nxlog IRC channel on irc.freenode.net. Use your preferred IRC client or the Webchat.