WSUS is the new name for WUS and it has a new(sortof) RC. The WSUS wiki has a nice list of features. This comes with a new Windows Installer too. Which no longer support the /uninstall parameter and instead required the KB to be removed via Add/Remove programs or by running %systemdrive%\Windows\$NTUninstallKBnumber$\spuninst\spuninst.exe (more here).

I should have blogged about this about a month ago, and thought I had, but when I went to update the entry with some links gleaned from Susan Bradley, I realised I didn't have one.