The $30 broken MiniTouch isn't working--through a blue cube it's an unrecognized USB device, which I find very interesting. Upon opening it up, the plate is bent; from the bend angle it was likely dropped on the front left corner from a significant height. There's no visible damage to the PCB or solder joints.
The RJ11 is not connected inside the case. Matter of fact, the RJ11 jack doesn't even have the metal wires installed, and there are NO PADS inside the case to which one might assume a number pad was attached. It appears that the RJ11 was intended as a removable cable for the MiniTouch itself, since the only thing within a solder splash of the empty RJ11 jack is the jack for the AT cable to attach.
I've harvested the key caps. I'm likely to harvest the switches when I have an afternoon full of patience and motivation. If anyone has need of SiiG MiniTouch key caps or a MiniTouch case, let me know in PM.