Include the ability to use this on a local area network so that I could create disk mages of all my computers drives from a central location.

This would save me the hassle of disconnecting and re-connecting my external back-up drives. I don't like to move my externals around too much. The more bangs and knocks they receive the more likely the externals can get damaged. Best to leave them undisturbed. I keep all of mine in the desk cupboard.