then you are going to the wrong place. The native SDK has not been released yet, only flash craps for the moment. get an apple or android, and life will be much easier for you.
I am afraid there is no zhuyin input in the foreseeable future. pingyin(hk chinese input) should be available in July. Only we Taiwanese use zhuyin. BTW, RIM is never gonna fix this goddxmn keyboard and stupid cursor after so many os update.