Times are tough, but one market is doing well: The Rapture. You've got your usual seeds and survival packs and first aid kits, but do you have your Rapture erotica for those long, lonely nights in the bunker? What about an iPhone app so you know when the Rapture occurs? How about informational and inspiring movies? And for those looking to break into the market, BusinessWeek gathers some helpful tips, such as "never give a date for your endtime prophecy."