The Art of Disassembly from Reversing Engineering Network (http://www.reverse-engineering.net/) — the Bible of the disassembly.
Open Reverse Code Engineering Community Web site (http://www.openrce.org).
Introduction to Reverse Engineering Software by Mike Perry and Nasko Oskov (http://www.acm.uiuc.edu/sigmil/RevEng/)
Reverse Engineering Team Web site (http://www.reteam.org/)
www.phrack.org — the best e-zine available, contains lots of articles, including the ones focusing on stack overflow.
Revenge — a site dedicated to reverse engineering and decompiling (http://revenge.berlios.de/)
Journal for Software Engineering, Virus-Research, Software-Protection, and Reverse Code Engineering (http://www.codebreakers-journal.com/)