Social Networking Sites

LinkedIn is a business oriented social networking site launched in 2003, with membership in excess of 75 million registered users. The purpose of this SNS is for maintaining and expanding trusted business contacts (individually and corporately). Competitors in this niche include Viadeo (30 million registered users) and Xing (9 million registered users), with LinkedIn leading the pack. LinkedIn offers many attractive features and at some point I may open an account to connect with several of my colleagues who have repeatedly invited me to join the SNS.