Sounds good.
I know the number 360 isn't in your nickname, but do you know if Japanese XBox 360s work the same way? i.e. any region XBox 360 can be run with any power supply and plugged into any power socket anywhere around the world (ignoring plug shape contraints) without needing a step-down/up convertor or without it blowing up.
I do know that Sony PS3s have universal compatiblity as far as power supply/voltage goes.