<A target="_blank" href="http://www.seancull.co.uk/public/seancull.nsf/dx/sntt-creating-a-persistent-ec2-domino-instance-with-ebs-boot-volumes.htm">Sean Cull has been studying how to put Domino on Amazon's EC2</A>. He's written up his findings - from what it costs to how fast it runs - so you can try it out.