One of the big features in iSCSI Software Target 3.3 are the new PowerShell cmdlets. 

Here is the new Technical Reference page: 

iSCSI Software Target Cmdlets in Windows PowerShell

http://technet.microsoft.com/en-us/library/gg278022.aspx

Checkout Jose Baretto’s latest blog that details all the commands that are available.

http://blogs.technet.com/b/josebda/archive/2010/09/29/powershell-cmdlets-for-the-microsoft-iscsi-target-3-3-included-in-windows-storage-server-2008-r2.aspx