We've had many questions about when Windows PowerShell will be released for Windows Vista. We plan to release Windows PowerShell 1.0 by January 31st, 2007. 

Cheers!

Jeffrey Snover [MSFT]
Windows PowerShell/MMC 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