UPDATE: For 10.8+ see: Managing Apple Software Update Server Across Multiple Servers 10.8+.
An internal Apple Software Update Server (ASUS) allows administrators to control what software updates client computers download etc.. more information about this service can be found here.
This all works great, but the initial setup requires you to manually tick each update to enable it to be downloaded.
This can be a bit of a pain especially when managing mulitple servers.
The following post advises on how to setup a Master ASUS with other servers Replicating the enabled updates. Saving the Admin time when setting up new servers & allowing central management.