Tools such as Linux From Scratch, NimbleX Live CD Generator, Kiwi image system, and the Ubuntu Customization Kit can help you create your own custom Linux system.
The Debian project has just released version 4.0r2 of its Linux distribution. The second update for the current stable release, Etch, mainly comprises bug fixes.
Shortly after a revision of the current 5 branch of the Centos release, the Red Hat Enterprise source-based distribution has now updated the older release to version 4.6.