WSUS and Windows Update Now Support SBS

SBS updates can now be automatically installed via Windows Update and Windows Server Update Services (WSUS)!  This is a huge win for SBS, especially in unmanaged environments.  More details can be found at
If you haven’t already deployed WSUS, the getting started guide (aka the “Step-by-Step Guide to Getting Started with Microsoft Windows Server Update Services on Windows Small Business Server 2003”) 

 is an excellent primer: