Those of you who use Virex 7.2.1 may like to know that McAfee now has version 7.5 Beta 1 available for download.
New features include
Background scanning
Active scanning (when saving files)
Auto Scan of mounted volumes
Scheduled Scanning and updates
Scanning of mailboxes
More advanced detection features
Why not take look for yourself
http://www.nai.com/us/downloads/beta/virex/