I have worked with Open stack for some time on and off depending on the situation.
With this in mind I wanted to share with you a great distro that offers OpenStack out of the box in 10 minutes.
As a cheap virtualisation solution alternative you can check it here: http://cloudos.internet.de/1032_a-true-cloud-solution
I did not have the opportunity to use it with NS. If you tried share your results and toughs.