In the past few years, social networks have become very big business indeed. Sites such as Facebook, Twitter, and LinkedIn are now some of the most frequently used services on the web, with millions of users the world over logging in daily to connect with friends, colleagues, and business associates. Their massive popularity has led to the establishment of a plethora of more specialized, niche networks designed to connect people who engage in shared activities. The advantages are obvious – they allow people to make contact with other people who are active in their chosen field, wherever they are in the world, and share their experiences and expertise. This can be particularly valuable for investors, as having the right information within reach can make all the difference between making a profit and a loss.