I noticed that CentOS 3.8 has been out for a few months. When I tried a YUM upgrade got a dependancy error:
> yum upgrade
Gathering header information file(s) from server(s)
Server: CentOS-3 - Addons
Server: CentOS-3 - Base
Server: CentOS-3 - Extras
Server: CentOS-3 - Updates
Server: Red Hat Enterprise 3 - i386 - Virtualmin
Server: Virtualmin Distribution Neutral
Finding updated packages
Downloading needed headers
Finding obsoleted packages
…Unable to satisfy dependencies
Package virtualmin-base needs mod_fcgid, this is not available.
I was hoping that there was a spam assassin upgrade in there as they are up to 3.1.7 now and currently this install is at 2.55.