At 27. October Microsoft has released the PowerShell 2.0!
Microsoft published it togetther with the Windows Management-Framework. Included in the framework are
* Windows Remote Management (WinRM) 2.0
* Windows PowerShell 2.0
* Background Intelligent Transfer Service (BITS) 4.0

We will publish a short tutorial, howto update from PowerShell 1.0 or CTP v2/v3 to PowerShell 2.0

You can download the the installation files here http://support.microsoft.com/kb/968929.