Windows Powershell will be in Longhorn Server! Seems obvious, but it didnt make it in Vista.

Next version of powershell will include powershell remoting enabling remote access to powershells via WS-Management to do this in a secure and standard manner.
 
Quest Provides free AD cmd-let:  http://www.quest.com/activeroles_server/arms.aspx
 
PowerGUI freeware, GUI on top of Powershell which basicly enable you to use every cmdlet available in powershell even third party or own cmdlets. PowerGUI is completely extensible with custom cmdlets and custom filters, which can be exported and imported to XML.
 
www.powergui.org
  
 
from msdn blog:

/n software (www.nsoftware.com) announced PowerShell Remoting which provides a secure, remoting solution for Windows PowerShell based on SSH that provides interactive, object-based remoting and remoting to non-Windows devices and operating systems. While the first version of Windows PowerShell provides native support for remoting via WMI, it does not provide interactive remoting for other Windows data sources such as the registry or certificates.  /n Software has also previously announced NetCmdlets which provides extensive networking management capabilities via cmdlets.
At the Microsoft Management Summit in San Diego today we announced that Windows PowerShell will be included in Windows Server code-named “Longhorn” and will be available in Beta 3 of “Longhorn”.   That's right, every version of Windows Server will ship with PowerShell!
 
http://blogs.msdn.com/powershell/