<p>Jonathan<br>
Why not look at the servers you can access on Amazon AWS?</p>
<p>Here is a good article from Admin magazine on using the Starcluster toolkit to set up instances on AWS</p>
<p><a href="http://www.admin-magazine.com/HPC/Articles/HPC-in-the-Cloud-with-StarCluster">http://www.admin-magazine.com/HPC/Articles/HPC-in-the-Cloud-with-StarCluster</a></p>