Where's Ben Ling headed next? We hear he might be headed back to Google — not a startup. Ling, a talented product manager, is closely watched as a talent barometer. His defection from Google to Facebook last year kicked off a series of trend stories about people leaving Google. Less than a year on the job, he's leaving Facebook , which has kicked off another series of trend stories about people leaving Facebook. Ling was recently spotted having lunch in Mountain View . You know what this means: A series of trend stories about ex-Googlers returning to the Googleplex. Update: Kara Swisher confirms Ling is returning to Google, tasked with figuring out how to make money off YouTube .