Well here's something that would come as a shock to anyone who's into portable games- Nintendo's upcoming 3DS might be region locked. This basically means that a game sold at retail in the US wouldn't be able to run on a Japanese version of the hardware.
It's a practice that used to be commonplace but has now become obsolete, for all intents and purposes. Whether this is true or not remains to be seen but we'll update all of you who are thinking about importing a Japanese unit (since it launches a bit ahead of the American one) if we get anything further.