Tagging Robot currently crawls your Facebook newsfeed and separates your links based on topics, as well as giving you relevant topics data for each link.
Tagging Robot uses NLP and Machine Learning to build users a topic-centered profile, and uses your Facebook Interests and Social Graph to populate the page. What you immediately see on your profile is a list of recommended links (based on followed topics), a list of all links shared recently by your network and your favorites (which you track by clicking the <3 symbol next to each link).
I think there are some interesting possibilities here. This can be done for RSS feeds, twitter feeds and hopefully can even have be a Cloud based service so that you can build your own Tagging Robots.
Related:
What’s the best automatic tagging functionality? http://qr.ae/iKfQ