Joel (Jaykul) Bennett has a cool post HERE where he is experimenting with some GUI scripting toolkits and a utility Out-WPF.  You can also checkout a Screencast of Out-WPF working HERE.  It is very cool and very short so give it a look-see.

Scripting GUIs with PowerShell is going to be a REALLY BIG DEAL going forward.

Jeffrey Snover [MSFT]
Windows Management Partner 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