John Sheehan has blogged his experiences learning PowerShell over his Thanksgiving holiday. You can read about them HERE. I found it a fun read.
Jeffrey Snover [MSFT]
Windows Management Partner 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