eSecurity Planet 
A resource for daily information on e-security targeted to IT managers. The site provides users with information from a variety of sources, including experts at security product and services firms, and the consultants who follow the security industry.

SecurityTracker.com
Information on the latest security vulnerabilities, free SecurityTracker Alerts, and customized vulnerability notification services.

F-Secure Shines Black Light on Root Kits
This EnterpriseNetworkingPlanet article discusses F-Secure's BlackLight Rootkit Elimination Technology which helps eliminate a particularly difficult breed of malicious software.