http://interviews.slashdot.org/story/15/08/17/1414211/interviews-ask-engineer-and-l5-society-cofounder-keith-henson-a-question Come by and join the fun. Also, if you are interested in the topic of space based solar power, this group is starting to pick up a little action. https://groups.google.com/forum/?hl=en#!forum/power-satellite-economics Keith