I believe OZ with OPIE can use qpf font files for display of Chinese text. It may support murphytalk as well.
OZ/GPE should support ttf font since it is similar to pdaXrom and uses X11(R6) for graphics. I presume SCIM would run on GPE as well.
I switched back to Cacko 1.23 full for the time being to get some actual work done before trying out OZ and pdaXrom again over the weekend.