This is one of the most exciting open source projects I've heard about.
From their website: "The OpenLuna Foundation seeks to return mankind to the lunar surface, first through robotic missions, followed by manned exploration, culminating in an eight person permanent outpost, and to do all of this in a way that it is accessible to everyone. Our research and technology will be open-source, we are privately funded, and one of our specific goals is to reach out to the community and educational systems to spread interest, enthusiasm, and involvement."
Yes, I joined, you bet. Makes me nostalgic for my NASA days, though of course that was government funding and got cut back. I'm an enthusiast for non-government projects and have been for many years.