I decided to pull it from the google play store soon and to make the download available here. Concerning the port I now have enough feedback sent to me through the developer console, so it won't be necessary anymore to make it available at this moment through the Play Store. I appreciate feedback in this thread.
Port of the AOSP Jelly Bean Keyboard (and its prediction engine) to ICS (Android 4.0.3 and higher).
* User dictionary issue on some devices when adding words
* Language switch doesn't work as expected on ICS
* Only English, German, French, Spanish, Portugese (Brazil) and Russian supported
Beta 1.1.1: added auto correction/completion indicator on the spacebar (can be turned off)
Beta 1.1 fixed user dictionary issue, fixed issue with custom input style (still some issues here, will be addressed later)
Beta 1.2 (Mirror)
Feedback appreciated. The plan is that the predictive features will also be added to Thumb Keyboard.