Lockheed Martin has been given the go ahead by the FAA to build it's 20 Ton variant Sky Tug (story.) They are working with Hybrid Enterprises which will be the official reseller for all of Lockheed's ships. Lockheed will keep the rights to sell these ships to the military if such a need arises.
Some things of interest when comparing this new design with the original concept is that the engines are smaller and the envelope is bigger. This will maximize the ships fuel economy as the expense of top speed.
Lets hope them the best of luck and cross are fingers that we will be seeing the worlds first production prototype flying by 2018.
