Brain drain at Research In Motion continues with the news that the PlayBook senior product manager Ryan Bidan left for greener pastures at Samsung. Bidan is third high-ranked RIM executives to defect for Samsung following the departures of the company’s vice president of digital marketing and media Brian Wallace last month. CrackBerry reports that Bidan is now Director of Product Marketing at Samsung Telecommunications America and Bidan’s LinkedIn profile confirms this. Prior to joining RIM in October 2008, Bidan was Product Manager at Microsoft’s Games division and Operations Manager at WorldWithoutWire. Two weeks ago Samsung’s chief product and technology officer Omar Khan resigned and went on to work for Citigroup, but it’s unclear whether Bidan will fill his shoes.