Hm, this thread is probably quite old by now, but there was one more thing I was a little concerned about, if that's alright:

Although I am probably going to use DropBox for this, what would happen if I were to send a NES rom file to myself via e-mail on another occasion?
Does it count as "illegal activities" and do you risk getting arrested for it?
Personally I highly doubt it, but I was wondering anyway.