Windows PowerShell 3.0 First Steps - A Windows PowerShell primer providing an overview of the major Windows PowerShell components.
Windows PowerShell 3.0 Step by Step - A Windows PowerShell step by step learning guide, complete with lab exercises, review questions, and answers. This book contains hundreds of Windows PowerShell scripts.
Windows PowerShell Best Practices - The Windows PowerShell best practices guide, containing real world tips, gotchas, and techniques from hundreds of field personnel. The contributors include Microsoft Windows PowerShell developers, Microsoft Windows PowerShell MVP's, Enterprise network administrators, and top Dev-ops.
The Microsoft Script Center - dedicated to system administrator scripters the world over.
The Scripting Guys Forum - community forum for asking scripting questions.
The Script Center Script Repository - the largest collection of admin scripts on the internet.
The Hey Scripting Guy Blog - thousands of blog articles about scripting. Updated twice a day, 365 days a year, it is the #1 blog on MSDN and on TechNet.
The Script Center Community Page - insight into Windows PowerShell community activities, especially activities where the Microsoft Scripting Guy and the Scripting Wife will appear.
The Script Center Learn PowerShell Page - central hub for learning about Windows PowerShell.
NetAdapter module documentation - official Microsoft documentation for the NetAdapter module from TechNet.
PoshCode - Windows PowerShell community driven script repository.
PowerShell.Org - Windows PowerShell community site containing blogs, forums, user group information and a script repository.
PowerShellGrroup.org - listing of Windows PowerShell community user group meetings.
PowerShellSaturday.Org - listing of Windows PowerShell Saturday community events.