Hewlett-Packard Co. is ousting out its longest serving board member, George Keyworth (pictured), for leaking confidential information anonymously to CNET.com reporter Dawn Kawamoto in January. Venture capitalist Tom Perkins, who resigned from the HP board in May, now charges that the company Chairwoman Patricia Dunn hired investigators to “hack” the personal phone records of board members to see who was leaking information to the press. The scandal was first disclosed in Tuesday’s Wall Street Journal online edition (subscription required) and Newsweek online. It was also reported later by BusinessWeek online, The New York Times, the AP and Chronicle. The Smoking Gun has obtained Perkins’ confidential letter to other HP board members that blows the whistle on the “sub-rosa” attempts to find the leaker.