If it just the front panel buttons, well, firstly, with a laptop or iPad version, you wouldn't be using those buttons! And a Korg Nano button and knob USB controller could add them where you could easily get them.

But more confusingly, if the knobs and buttons DO send sys-ex, surely it is a simple job to record each button press into a sequencer, and look at it?

More and more, it looks like a laptop approach, like Kay has done for Yamaha, is by far the best practical solution.

I must admit, given how enthusiastic you seem to be for iPad usage onstage for lyrics, mixing and other things, that iPad or a tablet PC usage for adding Karma seems to be such a turnoff...