At last, an end is in sight for Steve Case's misadventure in the healthcare industry. Revolution Health, his health-information website, is in merger talks with Everyday Health, a better-run, New York-based rival with more Web traffic. The combination would have more traffic than WebMD. Three's a trend, isn't it? If the deal goes through, this will be the third time Case has dumped a company he mismanaged on someone else's shareholders.