I started putting one together the other day. It's not 100% polished but it's pretty good. In addition to drumming via the pads you can control the volume of all 12 drum sounds, PCM speed, tom and hat decay, hat grain, and the time and delay controls. Right now the time and delay can be controlled via 2 horizontal sliders, pressure on 2 drum pads, or the width/position on the crossfader. Mostly because I was trying to figure out the easiest way to control them.
Anyway, if people want it I'll gladly upload when I get home from work today.