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.
Fair enough. You provide an interesting scenario: paying to provide free apps. I don't know the details of the Marketplace model. Apparently, you do.