Feeling a bit disconnected? LinkedIn wants to help. The company is an online business network designed to help professionals find jobs, people, and services providers. The company has grown to reach more than 40 million users in some 200 countries since its inception in 2003. LinkedIn is free to join; it also offers paid accounts and sells advertising. The company is backed by venture capital firms including Sequoia Capital, Greylock, and Bessemer Venture Partners, as well as individuals such as Marc Andreessen (co-founder of Netscape and chairman of Opsware), Joe Kraus (co-founder of Excite), and Peter Thiel (co-founder of PayPal).