As far as content filtering goes, the recently released (May 31) Mandrake SNF (Single Network Firewall) has this feature - go to
http://www.mandrakesoft.com/products/snf/ for more info. Hopefully, e-smith will be savvy enough to borrow the GPL'd code from this for a filtering feature in the next version (hint, hint).
Antivirus: it so happens that Trend Micro has a commercial anti-virus solution for Red Hat (6.2), as does McAffee. It is unlikely that e-smith would invest in antivirus for themselves, as it is too expensive, however, they may wish to enter into a partnership with one of these firms.