This quote sums up one of the hidden values of social integration on the web: "Twitter's value to consumers is due to the relevance of the tweet stream - we rely on our friends and contacts to curate interesting and relevant content to us, in real-time. Media and entertainment sites can replicate this experience by incorporating social content. For example, The Huffington Post curates relevant site content based upon the articles that a user's friends read or comment on, and Yelp streams business reviews, profile updates and other user-generated content to members from their friends on Facebook."
The power of data mining...
"Yet more evidence, if it were needed, of the value that can be found in the Twitter stream. The social media service that has been credited with doing just about everything, may even turn out to be a medical goldmine."