I use this mod of Xperia S keyboard actually and I must say it is very great looking but the keyboard itself is (imho) less convenient than the one of Android Jelly Bean. Thank you for the link it's a goob alternative, the one I'm actually using :-).
Thanks for this keyboard it's realy awesome but since I'm now using a MI2S I can't use it because you have to get the stock android 4.1 keyboard working before flashing the mod and there's no android keyoard on l MI2. I try to install with android 4.1 keyboard apk then flash the mod with CWM but...