Get list of plugins and versions installed from vCenter?

Hi all,

Does anyone know how to use PowerCLI to get a list of plugins installed in vCenter, their versions and any other information associated with those plugins?  I found Get-vCenterPlugin, per http://www.jonathanmedd.net/2012/02/managing-vcenter-plugins-with-powercli.html, but that doesn't seem to work for me in PowerCLI 6.0 Release 1.  Anybody know what I can use instead?  Or am I missing something with Get-vCenterPlugin?