In response to Japanese support (cross posting from another thread, and then some):
My only issue now, after doing the Japanese text upgrade, is that there's no clear way to input with Japanese text. Even if you use the onscreen selector to choose your input method, there are many times where it just won't switch to Japanese, or (on some very rare instances) English.
If there was a selectable keymapping, or an optional install package process upon flashing the rom (is this even possible?), because now since the kana keys are converted to control and alt, there's no real reliable way to go between input methods. At least for me, the on screen selector just doesn't work well. I tried fooling around with the keyhelper, and that didn't really help much, either.