Might I suggest it's also possible to put in the effort on the RPi and operating system side to only ever mount the SD card read-only, which would also allow for worry-free power-downs of the RPi? Without that, well, it's not a great idea to sell a thing to that many people that *is* going to get power cycled a LOT and *is* going to corrupt file systems ultimately (rendering the mod a brick until one re-images the SD card and likely making the game look like crap at the worst possible time).
Well, that's assuming the RPi is running Linux. I know it can be done with Linux. I don't know about other operating systems.
--Donnie