Two (slightly) different versions of the concept (with different wheels, fender etc) have been shown. Whether both (or either) get released in their present form remains to be seen. Don't worry, it's not supposed to be a dirt bike. It's a roadbike "styling exercise".
I have a feeling they will be putting this bike out worldwide. With sales of their dirtbikes declining mostly due to the crappy economy (toys always take a hit first) BMW wants to push the Nuda and Moab out asap.