Getting started in computer forensics
From ComputerWorld, find out how government employees are making the transition.
ZNnet: Train your staff in forensics
This is a good article on the basics of computer forensics and certification.
The National Center for Forensic Science (NCFS) is a program of the National Institute of Justice hosted by the University of Central Florida.
High Technology Crime Investigation Association (HTCIA)
"The High Technology Crime Investigation Association (HTCIA) is designed to encourage, promote, aid and effect the voluntary interchange of data, information, experience, ideas and knowledge about methods, processes, and techniques relating to investigations and security in advanced technologies among its membership." Whew!
Computer System and Network Security Information
You'll find loads of reference material and tools related to digital security.
I rarely include a list of links like this, with no content, but this guy has done his research. You will find everything from university programs in digital forensics to UNIX hacking commands.