This year, the Space Studies Institute is doing what used to be known as the Princeton Conference on Space Industrialization in conjunction with the National Space Society’s International Space Development Conference, in LA in May. They have a call for papers up for anyone interested in presenting relevant ideas.
[Update on Wednesday morning]
As Lee Valentine notes, the full name of the conference is Conference on Space Industrialization and Space Settlement, making it rare, if not unique, among regularly held space conferences.