Lately, I've done a little work for Rejoice Christian Schools in Owasso, Oklahoma. They just installed some new Ubuntu servers and needed a handy way to admin them besides SSH. Webmin came to the rescue.
It's real easy to get started using Webmin on 10.04 LTS with RCS's PPA.
(from the console or terminal)
sudo add-apt-repository ppa:rejoicechristianschools/ppa \
&& sudo apt-get update \
&& sudo apt-get install webmin-keyring webmin-repository \
&& sudo apt-get update \
&& sudo apt-get install webmin