10 social networking sites to keep you in the loop

10 social networking sites to keep you in the loop -- Federal Computer Week: "Do you find you need to attend breakfast presentations, department meetings, industry events, charity dinners and out-of-town conferences just to stay current? Are you forever tethered to your phone, Blackberry and computer? Wouldn't it be great if you could do all your networking online -- from the couch at home? Dream on."