I'm officially announcing my upcoming game Cascade Quest, hopefully ready late this year! Details are here:
http://www.icefallgames.com/CascadeQuest/
The early Space Quest series was probably my biggest inspiration in terms of humor and gameplay for this game. I'm using SCI Companion to develop it, and it runs inside the Unity engine.
Please check it out, and follow @icefallgames on twitter for more information and screenshots!