Here are some resources to get you started learning about PowerShell:
Materials to read
PowerShell User Guide
Scripting with Windows PowerShell
Task-based Guide to Windows PowerShell Cmdlets
TechCenter Sample Scripts
Blogs
Windows PowerShell Team Blog: http://blogs.msdn.com/PowerShell
Arul Kumaravel's Blog: http://blogs.msdn.com/arulk
Lee Holmes' Blog: http://www.leeholmes.com/blog
Marc van Orsouw's Blog: http://mow001.blogspot.com
Abhishek Agrawal’s Blog: http://abhishek225.spaces.msn.com/PersonalSpace.aspx