Stephen Herrod, a writer for Forbes wrote a very good article that outlines the 5 steps, or rather stages to a successful virtualization rollout. It’s definitely worth the read and puts things into perspective regardless of where in your rollout you currently are.
Read it here: http://www.forbes.com/2008/05/21/virtualization-vmware-opinion-tech-virtualization08-cx_
sh_0521vmware.html?partner=yahootix

Just FYI, Steve is VMware’s CTO. Glad you liked the piece.
Thank you for the correction on that! This was a complete oversight on my part.