@height8 I looked at that last night, most recent thing I could find was that doing so limited OS X vram to 128mb, rendering it pretty useless for any graphics things (which is what I would use OS X for).
@matigo I'm aware, which is why I haven't set such a thing up yet. Actually a tower wouldn't be too hard to transport — when a PC-building friend moved from HK–LA, he just took the components and left the case behind. If I were to set up a NAS right now, I'd do it in HK to avoid handcarrying hard drives on planes every year or three; unfortunately, the apartment in HK is a bit…unstable…for 24/7 electronics, and my parents wouldn't really be able to do much if something happened.