I attended TechED USA this year.  One of the key technologies that has a lot of buzz in the ITPro space is about Powershell.  I attended a few sessions on Powershell and the Exchange Management Shell (Powershell for managing Exchange 2007).   I found a free Powershell book online.

http://blogs.technet.com/mfugatt/archive/2007/06/11/free-windows-powershell-book.aspx

Other Powershell information.