This week, Jude writes in and asks about using a home theater Mac mini as a Time Machine location for his MacBook Pro. We show him how to do this with some tweaking to his MacBook Pro.
In the video, we used this code to put into Terminal.app:
sudo defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1
Remember, you can leave us questions in the comments! The video is on the next page.
Update: The terminal command is if you are using machines that are pre-10.5.6. If you have machines that are 10.5.6 or later you can just connect via Apple File Share and not need the terminal command. If you are trying to backup to a device that isn't running Mac OS X (such as a NAS) then you will need the terminal command.