I recently played around a bit with Xen. As always I use Debian as my choice. With Etch it was actually pretty easy to use it.
First I installed a plain installation without any desktop things.
Then I did a
apt-get install xen-linux-system-2.6.18-5-xen-686
and everyting xen-related got installed.
When I will play around with Xen again, I’ll update this post.
For details see:Â http://julien.danjou.info/xen.html