One is a novelty. Two are a coincidence. But three (and possibly in a few hours, four) make for a trend. So there is a new trend: exclusive, often expensive, high-level conferences that give away world-class speeches for free as online videos. Not just live videostreams and archives — that has been the case for a while now at many conferences — but edited and curated versions that can be watched online or downloaded into a laptop or an iPod or a cell phone and subscribed to via RSS.