pleco sure was useful for that handwriting feature! but surely there's enough space on the screen of an ipod to use one's finger to semi-accurately write a character. I think as long as the iphone can keep track of the number of brush strokes, I think it would work. But I haven't developed apps for the iphone.
the pleco radical index was useful too, but less popular for some reason. perhaps it's because radicals are not always easy to match up to their respective characters.
if you could implement a third feature - that feature discussed in 'chinese character fast finder' by tuttle, isbn 0-8048-3634-5, that would sure be useful to have for users of this software, because it would help some people to find characters that are hard to find. the book organizes entries according to common graphical patterns (similar to radicals, but more clear and distinctive). this is not a prop for that book, but a recommendation that this feature would really be good to include electronically. I would never take this book anywhere with me for travels, cause it's a big clunky trade paperback book, but it's method for finding a character based on a graphical features in the character is really really useful and perhaps revolutionary (oh yeah, like a 'killer app' usefulness).
all three methods, or even the first two (which you included on the older versions) would work fine, man... I CAN'T WAIT for you to make this iphone feature, and BLAST the rest of the competition (if you could even call it that) from the waters!
