Don Jones and Jeffery Hicks are doing a great series of PowerShell blog entries at:

http://sapien.eponym.com/blog

Check them out.

Jeffrey Snover [MSFT]
Windows PowerShell/MMC Architect
Visit the Windows PowerShell Team blog at:    http://blogs.msdn.com/PowerShell
Visit the Windows PowerShell ScriptCenter at:  http://www.microsoft.com/technet/scriptcenter/hubs/msh.mspx