I have just installed Ubuntu Feisty (7.04) server edition on my home server. Needless to say that it was a piece of cake, including the setup of the software RAID-1 array. I have been able to do everything using the text mode graphical installer. I did a minimal server installation with no special features as I am going to include everything within virtualized guests.
The killer functionality that my friend Allon pointed out in an entry on my wiki regarding the installation of Xen on a Hetzner dedicated server: now we can install under Feisty a completely functional Xen system — including the dom-0, the host — using a single command:
sudo apt-get install ubuntu-xen-server
This is quite nice. Just reboot after the install process is finished and you are ready to setup you individual guests systems (domUs).