[idn] Cell phones and japan.

[lucid]

I just got back from a weeklong vacation in japan. It seems to me that
everyone I met there gets email thru their cell phone. Text entry is menu
based with kanji selected via a joystick like nub.

Possible issues include;
How much memory does an implementation of name prep require?
What encoding do these wireless devices use?
Can they even handle ACE?
Should we even worry?