Ubuntu Security Resources
Ubuntu Unleashed
Ubuntu Geek
This should be enough to get started. I'm currently working on extracting the *.debs from a Ubuntu Security Distro called Protech that can be find at http://www.lifedork.net/protech-ubuntu-based-linux-security-distro.html. I will then post an ISO so that you can add all of the security tools provided without having to re-install your operating system.
