Social networks should have open APIs, SimplyHired and LinkedIn show why. It's another example of how social networks can create value. Pete Cashmore adds some relevant thoughts as well..
"Simply Hired's edge among other jobs sites is clever in its use of social networking, says Greg Sterling, founding principal of Sterling Market Intelligence, a consulting and research firm in Oakland Calif. Through a deal with LinkedIn, users can press a button marked "WhoDo I Know?" that is placed with each job listing. LinkedIn searches the user's network to tell them who they know at the hiring company, or who they know who knows someone at the hiring company."