Valve approved the game for Steam Cards feature, which means you should be getting some items very soon to your inventory for just playing the game. Some concept art was created for this, featuring the game companions, areas, quests and some historical events of the setting.
On development: I am already working on the new content and areas, some of it will be available for Beta Testers in about a month; the complete update should be available by the end of May (subject to changes, this is a mere estimate). New and exciting adventures are coming!