Yep. According to javispedro, there's still important features of the keyboard that remain closed source.
http://mxr.maemo.org/diablo/source/h...n-im-ui.c#2208

I'll try a full blown xkbd keyboard layout that fills up about 85% of the screen and see how that works for DialCentral.

The only thing is that you'll need to use a hardware key to open/close it.

So yeah, if anyone has a better idea, I guess this has to be the direction to go.