In the year since the energy industry last gathered in for its big annual confab in Houston, prices for oil and natural gas took a dive that few, if anyone, saw coming. A chastened parade of energy executives, analysts, academics and government officials from several countries delivered speeches and participated in panels as part of IHS's CERAWeek energy conference, worrying over prices and making a profit, and speculating on what it could all mean for economies and consumers around the world.