Spotback is a new breed of personalized news service. It is designed to quickly learn each user's fields of interest and style by analyzing how users rate and interact with news information. It then offers users the most interesting, relevant and hard to filter news information personally tailored to their taste. Spotback uses sophisticated algorithms that analyze social behavior. These algorithms are designed to harness the power of the entire community for the benefit of the individual user. The ideas and technologies behind Spotback are based on the understanding that every user has his own interest and tastes. The true challenge of a personalized information service lies in finding the information that will interest individual users the most rather than the information that most users think is interesting. This concept makes Spotback fundamentally different from the existing 'find the most popular content' or 'top stories' technologies.
It seems they are a company that could fit my research. I will check out the service the coming days.