There is a new interview with Boain posted at PC Gamer talking about resources and other stuff. Not anything Mars shattering for anyone who has been following development of this, but an interesting read nonetheless.
http://www.pcgamer.com/surviving-mars-resource-system-is-inventive-intricate-and-challenging/
http://www.pcgamer.com/surviving-mars-resource-system-is-inventive-intricate-and-challenging/