Ant writes: "Royal Pingdom has age statistics for nineteen/19 different social network sites (Facebook,/., Digg, etc.) and crunched the numbers (note: to get consistent age data for the various sites we used site demographics information for the United States/U.S. gathered from Google's Ad Planner service and then did some additional calculations to get all the data we needed).
antdude writes: "Wired has a three pages article (one full page) on "how medical data revealed secret to health and happiness. A revolution in the science of social networks began with a stash of old papers found in a storeroom in Framingham, Massachusetts (MA). They were the personal records of 5,124 male and female subjects from the Framingham Heart Study. Started in 1948, the ongoing project has revealed many of the risk factors associated with cardiovascular disease, including smoking and hypertension.