It is the coolest search engine in the history of search engines. You search for something (like a person or product or famous animal or whatever) and it returns information, pictures, and, most awesomely, connections to other people, places, things, etc. Then you click on that. Boom. More information, more connections. Best of all, it keeps track of your connections so you know exactly how you got from 'My Little Pony' to 'Barack Obama'.
If this had been around last year, I would have just kept my AmeriCorps position in order to spend most of my time on this website.