Command allows you get the UUID of the machines on your network. Handy when manually adding machines to your workgroup manager. Especially when adding 10.7 machines to your WGM.
echo "hostname: `hostname`"
system_profiler SPHardwareDataType | awk '/UUID/{sub(/^[ \t]+/, "")}; NR == 17 {print}'
echo "--done--"
"Multiple versions of OS X clients can all use the same URL to connect to an OS X Server running the Software Update Service. Before following the steps in this article, your Software Update Server must be running Mac OS X Server v10.6.7 or later. Be sure to review the Software Update Service compatibility page here to learn which client versions can get updates from which server versions"