In the world of weight loss programs, Weight Watchers rules, with more than a million members worldwide. New CEO David Kirchoff is credited with increasing meeting attendance in North America by fourteen percent, and upping online membership by 64%. Those numbers mean money, of course. Weigh Watchers is valued at an estimated at five billion dollars…double that of a year ago. Jeffrey O'Brien profiled Weight Watchers' impressive “before and after” shot for Wired. Specifically, an overhaul of the program’s trademark points system based on current nutritional science. And we also take a look at who's next in the Weight Watchers spokesperson sweepstakes.