Hey, Scripting Guy! Can Windows PowerShell Call WMI Methods?

Hey, Scripting Guy! I have seen a number of methods listed for WMI classes on MSDN, but when I try to use them in Windows PowerShell, they do not work. I am wondering what the secret is to making these things actually do something. I assume they are not really broken because I have VBScripts that I downloaded from the Script Center Script...