Here is the newest Linux distrobution on the block, Netwosix. It is a source based distro, like Gentoo and Sorcerer, and it seems to be explicitly modelled after the BSD base/package-source tree. It is the brainchild of 17 year old self-described hacker Vincenzo Ciaglia. It stands out a little because its based completely on kernel 2.6. . . .
Vincenzo Ciaglia (ciaglia@netwosix.org) submitted the following "Vendors/Products" news story:

URL: https://www.secpoint.com

Summary:
The NETWOSIX Linux distribution (v. 1.0) is now available for dowloads. Linux Netwosix is a powerful and optimized Linux distribution for servers and Network Security related jobs. It can be also used for special operations as penetration test with its big collection of software and sources security oriented. It's a ligh distribution created for the requirements of every SysAdmin and it's very portable and highly configurable.

The link for this article located at Vincenzo Ciaglia is no longer available.