The people over on WMI, WinRM, and BITS have started up a blog to share their systems management expertise with the world.  Check it out:

http://blogs.msdn.com/wmi/

Here are some fun posts to get you started:

Accessing WMI Data via WinRM
Let’s Troubleshoot WMI (Part 1: Remoting & Security) (this one includes a handy chart I wrote years ago to figure out what I needed to change when WMI couldn’t connect)
Introducing BITS PowerShell Cmdlets

Hope this Helps,

James Brundage [MSFT]