Greetings from 35,000 feet! I am en route from my home in Grinnell, Iowa to Sydney, Australia to participate in a workshop on---oddly enough---environmental sustainability. Reducing negative environmental impacts is a current hot topic in my field of Human-Computer Interaction ; indeed, so much so that I've seen at least one researcher reduce his carbon footprint by using iChat to remotely present a conference paper. Computing technology has a tremendous capacity both to make the problem worse and to help us (...) make wiser choices. (shrink)