Facebook Friend Reports
The site has many features but the one I liked was their Facebook based data visualization reporting capability. Try it as it is free and you will be able to see your Facebook friend related data in new and fascinating ways. I found the graphs interesting and educational and they kept me glued to the computer screen.
The negatives of such type of search engines is that they make a lot of decisions for you . And this means that they control what you see and what you don't. This is in sharp contrast to the approach of showing the user short summaries of any web page that met the user search query and letting the user "click" his way through.
In summary, it is a great attempt at presenting organized information to the user but I am not switching my favorite search engine just yet.