[Jason]

Some helpful sites:
http://www.virusbtn.com/ <-- Virus Bulletin
http://www.westcoast.com/cgi-bin/redirect.pl <- Computer Security

The offer reviews once in a while.

Antivirus vendors:
AntiVirual Tookkit Pro
Avast
Colluna Hardwall
ChekMate ESafe F-Prot
F-Prot Pro
InoculateIT
Integrity Master Sophos Sweep VirusBuster VirusNet