I'm wondering the same, although I am not as rich or crazy as you apparently are
I see no reason why the set-up would be different to the system available in the x1 or the 320d xDrive, 335i xDrive etc. So basically a rwd with a wet multi plate clutch that can pitch in the front axle, electronically controlled. Only heard good things about it and having fun in the snow will be no problem:
More concerned how it affects summer driving... And the fact that a 120d xDrive still makes more sense....