I've been reading up on Powershell and found a few articles on IIS7 related material. Using Powershell will be handy with IIS7 because of the new WMI provider. Also, check out my blog post on Powershell reference links..
An Introduction to Windows PowerShell and IIS 7.0
http://www.iis.net/default.aspx?tabid=2&subtabid=23&i=1212
Writing PowerShell Command-lets for IIS7
http://channel9.msdn.com/Showpost.aspx?postid=256994
Managing IIS 7 with Windows PowerShell
http://www.iis.net/default.aspx?tabid=2&subtabid=25&i=1211
Enjoy,
Steve Schofield
Microsoft MVP – IIS
Pondering Thought 