As of a 11/22/13 recheck, this ended:
The brown Samsung NX300 with the 20-50mm and black 50-200mm lens is now going for $570 at B&H Photo (ends 11/23/13)... Research with Samsung NX300 reviews list...
On the other hand, if you want an entry-point into the Samsung NX system without breaking the bank or committing to the system, for $300 you can get either the black NX1100 w/20-50 or the white NX1100 w/20-50... Research with Samsung NX1100 reviews list (only one review as of the time of writing).
Both cameras come with Lightroom included in the box. This is a Samsung-Adobe deal. I don't know which version of Lightroom. Thanks to Diego for the reminder in the comments!