There is an article by Dru Lavigne in the July issue of BSD Magazine about using Firewall Builder with the BSD pf firewall. If you are already a Firewall Builder user managing pf firewalls you may not learn anything new from this article, but it provides a good getting started overview for new users.

It is great to see a publication like BSD Magazine showcasing Firewall Builder!

http://bsdmag.org/magazine/1267-openbsd