For now I'll provide the most common links I use for gathering up to date security news, and in the future I will sort and describe them better.

Hacker Network News
System Administration and Network Security Institute
SecurityFocus, Home of BUGTRAQ
Nomad Mobile Research Center
Computer Crime and Intellectual Propery Section (CCIPS)
PhoneBoy FireWall-1 FAQ
IBM Proactive Security Project
IT Security Cookbook
MindTerm Java SSH Client