Power Shell 2.0, one of the newest products from Microsoft, an extensible command line of Microsoft with a scripting language, is now back to Vista and XP as Power Shell went gold with the release of Windows 7 RTM.
Apparently Power Shell is already ported to Windows Vista than RC is now available on Connect, which is also a more detailed description:
Microsoft Windows PowerShell is a new command-line shell and scripting language designed for system administration and automation. Built on the .NET Framework, Windows PowerShell enables IT professionals and developers to control and automate the administration of Windows and applications.
According to a post on the blog Power Shell Osama Sajid, a program manager at Microsoft, Power Shell 2.0 for XP SP3 and Vista SP1 in the coming months. “