Kiwi Linux is a slightly modified Ubuntu Desktop image for the i386 architecture, that is in sync with Ubuntu's LTS cycles and uses its package archives.
The latest release, Kiwi Linux 12.08 is based on Ubuntu 12.04.1. Differences from it include :
Gnome Classic instead of Unity
All languages but de,en,hu,ro removed
Chromium, Pidgin and VLC replace Firefox Empathy and Totem
No mail client included but the desktop-webmail helper
Flash, audio and video codecs for restricted formats
p7zip, unrar for better interop with Windows users' archive files
Kiwi Linux is built from the official Ubuntu and the Kiwi Linux PPA in Launchpad.
See http://kiwilinux.org/en/