Cui – On My WayiCosta:The First System-Level Chinese Input Method in iPhone
Saturday, October 20th, 2007Yeah! All chinese iphone owners can now enter chinese characters in any iphone applications now! Yes, you get it: a platform IME! COOL,right? 
:-):-)
Oh, I forgot its name: iCosta. And now version is 0.9.
If you use Installer (AppTApp), please launch Safari in iphone to visit here. Then follow the instructions and reboot your iphone;
If you use iBrickr, then download iCosta.pxl and install from your local disk. Don’t forget to reboot your iphone, either.
And the switch between en keyboard and ch is “.124” key. Try it out now! Time to say goodbye to my installed SMS chin apps now with much appreciation
Update(Sep.25,2008): for now, iCosta has updated to 1.2.3(Chinese) for the new iPhone OS 2.0.x and 2.1. You can get it through Cydia. Currently iCosta is still my preferred IME for Chinese.
Update(Sep.16,2009): 1.2.8 for 3.0&3.0.1 released.