Despite the photo on the iDJ2 webpage, from the product description it appears to be simply mounting the iPod as a UMS device. I can conceive of no other way in which it can play two songs at the same time. I also can conceive of no other way in which you can mount additional iPods via USB if the Numark device was controlling them. IF this is the sum of how it uses the iPod, then it should be Rockbox compatible.