Hi Denise,

Nice article about this hot topic. Thanks !

I would like to recommend to also take a look at openQRM (http://www.openqrm.org) for the open-source management tools section.

It's built-in virtualization layer conforms deployment and management of physical servers and virtual machines from different types. openQRM supports VMware, Xen, QEMU and Linux-VServer by additional plugins and seamlessly assists the system-administrator to migrate servers from physical systems to virtual machines (P2V), from one virtualization technology to another (V2V) and also from virtual back to physical systems (V2P).
openQRM's functionality can be dynamically adapted to the needs by a whole bunch of different plugins for e.g. enhanced monitoring via Nagios, storage-integration with LVM providing fast-cloning capabilities for server-images, automated resource-management and deployment, high-availability for the managed systems and more.
It's goal is it to unify and standardize data-center management by integrating and combining existing and "known-to-work" tools within a single-management console for the complete IT-Infra structure.

many thanks + enjoy,

Matt

www.openQRM.org - Keeps your Data-Center Up and Running

Matt's blog - http://mattinaction.blogspot.com/