Facebook’s high-profile CTO Bret Taylor is leaving the Silicon Valley social networking giant later this summer, with future plans to work on an as-yet-to-be-determined start-up. The move is likely to be of concern to some over the newly public company’s ability to hold onto entrepreneurial talent, especially in the wake of continued intense media and investor scrutiny over its rocky IPO last month. That’s especially true since Taylor has been in charge of both platform and mobile efforts at Facebook, a critical arena for it. Read the full story at AllThingsD.