Ok. First off, this thread is insane, as usual, for a new major ROM release.
There seems to be some confusion on how to get the stock Android keyboard back. There are 2 files required for it, which you can extract from any deodexed ROM's zip such as SC:
/system/app/LatinIME.apk
/system/lib/libjni_latinime.so
Next, you need to remove ime-mtm-stock-gingerbread.apk from /system/app on your phone, as it also uses the libjni_latinime.so file.
Then, copy or adb push the 2 files you pulled from your deodexed ROM's zip to there proper folders and reboot. Before you try to use it after you boot up, go to Settings > Language & Keyboard and configure it as wished.
Finally, go to any text input field (text message) and long press to choose the input method and select Android keyboard.
Enjoy.