I have an update for everyone. I'm using a Retina MacBook Pro running 10.7.4 and the Rig Kontrol 3 is working perfectly as far as I can tell.
I copied the IOUSBFamily kext file from another MacBook Pro running 10.7.3 and using Kext Wizard I installed the file.
Now, my USB 3.0 WD Passport hard drive is only capable of speeds up to 480Mb/s now but it still works properly. This of course is still a temporary fix until Apple can release an update so USB 2.0 AND 3.0 devices can both work in the same port, but I have to say, this is a huge step.