This group is for thoughtful discussion about technologically feasible space colonization, such as near earth orbit settlements. Discussions are on all topics relevant to space colonization ranging from technology to politics.
Some suggested preliminary reading can be found here:
If you are truly interested in space colonization as a next step in human civilization, this is the group for you. The main activity of the group will be monthly meetings (refreshments provided!) for informal discussions and brainstorming.