The SD card contains everything for the RPi, right? I set up a home media server for my parents with RaspBMC and an IR receiver about five years ago. They live in a poor power region so the SD cards can go wrong easily on power failure. I just `dd`'d a bunch of identical SD cards and left it to them to swap.
Ideally, keeping the SD cards read-only would have been better but I was visiting only a few days and I needed to support subtitle download so I settled for this.
