Hi All, I have updated my script that converts the official ubuntu cloud image ( http://cloud-images.ubuntu.com/releases/precise/release/) into a template that can be used by CloudStack + XenServer. It also fixes cloud-init so that it works with CloudStack.
It can be found here: https://github.com/creategui/CloudStackImageScripts I also created a couple other scripts to allow you to mount a vhd file on ubuntu. If you have questions let me know. Carlos