Keeping multiple machine up to date

[hal]

I have 10 FreeBSD machines which I need to keep
up to date software wise.  Half of the machines
only have access to the local network.  On the
machines which have network access I use cvsup.
Cvsuping multiple machines is time consuming, is
there a better way?  What is the conventional
wisdom for keeping many machines up to date?

A pointer to an FAQ or something would be great.

hal