Red Hat Compliance Audit
Tenable's research group recently added a Nessus 3 audit policy for Red Hat Linux. This allows Direct Feed users who are auditing missing security patches with SSH credentials to also ensure the system has been properly locked down.
The audit tests for several hundred different items such as the permissions of /var/log/messages and if any user accounts have poor permissions in their home directories. Audit files for Solaris, security recommendations from CERT and generic UNIX checks are also available in addition to many checks for a variety of Windows policies.