My August Mr. Roboto column in REDMOND Magazine was published online with a broken link to the PowerShell script. This has since been fixed. You can download the Get-WMIInfo.ps1 script from here.
The script is essentially a wrapper to help you discover information about a given WMI class such as a help description, its methods and properties. The script will write a custom object with WMI information to the pipeline, or you can use the -report parameter to display an expanded view of the class' methods and properties.
Experienced PowerShell users can probably get by without it but newcomers to PowerShell may find it useful. If nothing else, it can serve as an example of creating custom objects.
Enjoy.