I have also wondered how hard it would be to swap out the shifter knob. I personally would like to put a "T-handle" on mine. I think that they provide a more solid feel, as you wrap your hand around them. I think they are also better for "Power Shifting." Just my opinion.
But if the handle uses some kind of special connector, forget it, I guess I'll just have to wait and put a shifter kit in my car so I can use one, RATS!
Maximental