I just wanted to mention a book that I am writing for: System Center Operations Manager 2007 by Kerrie Meyler, Cameron Fuller, John Joyner and Andy Dominey.
(The link and image are for the 1st edition.)
A publication date has not been set yet, to my knowledge.
I’ve contributed a chapter on using PoweShell where I cover the basics of what a OpsMgr user should know, show some basic examples of general Windows tasks in PowerShell, then show some practical examples of how to use PowerShell in OpsMgr to script and automate tasks.
(Image copied from Amazon link.)