Windows PowerShell is shaping up to be the technology around which IT Pros from *nix and Windows worlds meet and build community (virtualization will be another, IMO). Check out Bill's post on PowerShell on Port25. Some nifty links there, such as:
Interview on Port25 with Jeffery Snover, Architect of PowerShell.
NewsGator Powershell Provider (my favorite RSS reader): http://www.codeplex.com/NewsGatorPSProvider
Powershell Analyzer: www.powershellanalyzer.com
Expose SharePoint as a filesystem: http://www.codeplex.com/PSSharePoint
‘Powershell Week’ webcasts, virtual labs, and ‘labcast’ - http://www.microsoft.com/technet/scriptcenter/webcasts/ps.mspx