publicly available overlay for Gentoo as well as a Pentoo livecd for penetration testing and general security tools.

Pentoo is a security-focused livecd based on Gentoo

it's basically a Gentoo, a Linux-based operating system and a meta-distribution, which means that it is built automatically from source code and is customized with the functionality that you want to have and without the unnecessary features that you want to avoid, with lots of customized tools, customized kernel, and much more...

http://www.youtube.com/watch?feature=player_embedded&v=YzJf_SAxEto' target='_blank'>http://img.youtube.com/vi/YzJf_SAxEto/0.jpg' width='854' height=480 />

Discussion and support available on irc.freenode.net in