from ubuntuhomeserver.org

This site has been established to facilitate a new Home Server Edition of Ubuntu.
The idea of a Home Server Edition of Ubuntu was recently outlined in this thread on the official Ubuntu forums:
Ubuntu is a leading free operating system for use on personal computer and servers: Ubuntu.com
The UHS project is community driven. It is not yet an official Ubuntu project.
Goals:

Ubuntu Home Server UHS will be an edition of the Ubuntu operating system which allows users to administer their home network. With Ubuntu Home Server you will be able to store all your music, songs and pictures in one central location, to access your files over the internet and to backup all the computers in your house.

The goal is to have a working release available with the upcoming Gutsy Gibbon release of Ubuntu or perhaps Gutsy 1 at the latest.

Something to take on the Windows Home Server release!