The following sites provide links to extensive resources related to computer (digital) forensics:

CERT (Computer Emergency Response Team)
a reporting center for Internet security problems at the Software Engineering Institute (SEI) of Carnegie Mellon University.

Computer Forensics, Cybercrime, and Steganography Resources
books, papers, presentations, mobile & PDA forensics, toolkits, software, digital watermarking.

Electronic Evidence Information Center
conferences, projects, periodicals, organizations, tools, and education.

Forensic Evidence Master Index
an information center in forensic science, law and public policy for lawyers, forensic scientists, educators, and public officials.

Internet Resources for Computer Forensics
educational, government, industrial, and publisher sites, hacking, law and legal issues, and online lectures (a part of Professor O'Connor's Criminal Justice Megalinks).

The SANS (SysAdmin, Audit, Network, Security) Institute
information security training and certification since 1989.

TUCOFS - The Ultimate Collection of Forensic Software
a complete resource for cyber law enforcement technologies (DOS, Windows, Unix/Linux, MAC, Novell, Mainframe, OS/2, PDA).

Zeno's Forensic Site
over 1200 links on forensic medicine, forensic psychiatry/psychology, forensic sciences, and general information resources.

International Journal of Digital Forensics (IJDE)
IJDE is a forum for the publication and discussion of theory, research, policy, and practice in the rapidly changing field of digital evidence