General alerts:
1. Global security news from FIRST
2. Security lists
3. Mozilla security alerts
4. Oracle security alerts
5. MySql security issues
6. Apache security vulnerabilities
7. eSecurity

Virus alerts:
1. Trend Micro virus alert
2. Mcafee virus alert
3. Norton Symantec virus alert

For windows:
1. Microsoft Technical Security Notifications
2. Windows Alerts
3. Microsoft Security Newsletter
4. Microsoft TechNet Centre
5. Microsoft TechNet Security Centre
6. Windows CE Updates

For Solaris/Opensolaris:
1. Solaris Security News
2. Opensolaris Security News

For Linux (Suse, Debian, Red Hat):
1. Suse Security
2. Debian Security
3. Red Hat Security updates

For Cisco:
1. Cisco Security Center