Links:

The FreeBSD Handbook FreeBSD Handbook

OpenBSD FAQ Frequently Asked Questions

The NetBSD guide The NetBSD guide

A guide to FreeBSD -- recommended! Comprehensive guide to FreeBSD

Informative FreeBSD site: FreeBSD Diary

Unix and BSD in generel: VMUNIX.com

Also try www.netcraft.com.

FreeBSD Forum site: www.freebsdforums.org

Slashdot BSD section: SlashDot

Google BSD search: Google