Yesterday I stumbled over the following website while I was searching for Powershell WMI Eventing.
You can find all sessions from their event in January as video to see them online and for free. I found them quite useful (haven’t seem them all yet).
Here is a link listing all available sessions:
NIC 2012 Program
If you are interested in WMI Events have a look to these sessions:
Thomas Lee: An introduction to WMI And PowerShell
Thomas Lee: WMI Eventing with PowerShell