Since file hosted by mediafire could be expired some day, I put the files on my own space. http://imlab.cs.nccu.edu.tw/~kaihsyn/files/bbPress_zh_tw.zip
Here’s the po and mo files.
http://www.mediafire.com/?k7lbea77qe8skat
I think I’ll update these files soon, will post them up.
Hope you enjoy!