Starting January 22nd - You can deploy Microsoft Silverlight with Microsoft Windows Server Update Services (WSUS)
Now, IT administrators have the ability to deploy Silverlight via WSUS. By using WSUS, administrators can fully manage the distribution of Silverlight to all computers running the Windows operating system in their network. (To get more info on WSUS, go to http://technet.microsoft.com/en-us/wsus/default.aspx).
I'll have more information on these developments next week. Until then enjoy the weekend!