FYI, some references: http://workspace.globus.org/vm/index.html http://workspace.globus.org/ http://www.vmware.com/ http://www.cl.cam.ac.uk/Research/SRG/netos/xen/ http://www.xensource.com/ From the discussion about the candidate next step: > + VM (Virtual Machine) image management for Xen or VMware -Keisuke