Then charge 2.50 USD to download it and use the cumulative income to pay for the yearly fee and also provide you with some cash for good sushi and sake.
Because the current WM version is free?
Because the equivalent iPhone app is free?
Because the dictionary files I'm using are free?
Also note that this is entirely dependent on WP7 having built-in Japanese handwriting recognition (I know the beta at least has Japanese font support now, but that by itself is not enough). I could hypothetically make my Japanese input panel (which is currently
a SIP under Windows Mobile, so it can be used with any application) part of the dictionary application, but I didn't write the handwriting recognition algorithm I use for that, and the code I based it on is GPL, so if I include it in the dictionary the entire
dictionary automatically becomes GPL.