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