I didn't try to log into the Registration site, but I did check my pre-order code. It is as you all said, 6-3-6-3 (letters/numbers)

XXXXXX-111-YYYYYY-222

Guess we get to find out on the 20th if something is wrong. Or maybe a community rep can respond here. ^^;

I guess this would mean that JP region can download now since they can add their codes, and we will be able to start downloading on the 20th? I guess there's something to be said for spreading out the registration/download chaos. Not a bad idea, really.