Here is a demonstration of using both the Guitar Hero World Tour Drums for Wii and the Rock Band Drums for Wii to create a full MIDI Drumset:
Camille, the programmer of OSCulator, got his program working with the Velocity-sensitive Guitar Hero drums. Download OSCulator here:
http://www.osculator.net/wp/
I’m still using JunXion to receive MIDI from the Rock Band [...]