here has been lots of activity in the past six months since we last took a look at what the three major virtualization vendors Citrix, Microsoft and VMware, have been doing (see the most recent virtualization comparison that I did for Datamation here:: Virtual Server Comparison: Xen vs. Microsoft vs. VMware, 2010).
Citrix has released new software. Microsoft and VMware are concentrating on data centers. And there are some new faces to look at too. You can read the full article here.