I hadnt seen this anywhere before, but a collegue pointed me at it and i must say am very impressed. It basically lets you view the WMI Classes then generate code to use them
It is very handy when working on BizTalk utilities
Get it here
http://www.microsoft.com/downloads/thankyou.aspx?familyId=2cc30a64-ea15-4661-8da4-55bbc145c30e&displayLang=en