from community.smoothwall.org

Smoothwall Express 3 is based on the latest Linux 2.6 kernel and features a new open architecture designed to make it easy for software developers to produce their own security components for SmoothWall. This is intended to foster the development of new and improved open source software, to the benefit of the open source movement as a whole. SmoothWall Limited will actively encourage this process and provide financial support to the development of components that it feels address common security needs.

My personal favorite linux firewall distro has been updated. If you have a spare Pentium 133 or better laying around, you NEED to setup your own firewall running Smoothwall.