Well a few years back when we went with VI, it was about the value. Since then vmware has come out with the Essentials kit aimed at SMB. I am currently playing around with a new physical server with vmware ESXi 4.1 that has a few low volume production VMs on it. I could not get that new server (hp dl360 g7) to work correctly with VI and Oracle would not support me
So it looks like I am heavily leaning toward vmware. I would honestly like to hear from some people on performance/value of different virtualization platforms.
Derek