After reading many blogs, and trying for a while before succeeding, in creating an Ubuntu 9 pv template on xen, i have finally got it working, and have created a template which runs in PV mode, has the xentools installed and is avaliable for download for free.
A paravirtualized Citrix Xenserver 5.5 template for Ubuntu 9.04 x32,
you can find more templates in the templates page above.
username= root
password= password
download the following files extract them with 7zip and import the xva via xencenter..
http://rapidshare.com/files/284728243/ubuntu9.04template.7z.001
http://rapidshare.com/files/284731379/ubuntu9.04template.7z.002
The template is a bare ubuntu installation and has ssh-server installed, it is set to obtain an ip from dhcp, and works in PV mode,
please let me know if you run into any problems
More templates to follow