Dashboard - Virtual Machines count per Datacenter and Opertating System

Hi,

          We're being asked couple of times per year to provide a report of virtual machine count for various reason (mostly auditing), we usually run this report with powercli, but i would like to have this available at all time for our management team, is it possible to create a dashboard or a report that will return the vm cound on a OS basis per datacenter, something like:

               DC1

               Windows 2003     100

               Windows 2008     200

               Read Hat             50

               Others                 3

               DC2

               ..... you all get the picture.

          I will continue working on this, if someone already made something like this, please let me know.

          Thanks!

PS: I did look at the View available but it doesn't provide the ganularity i need.