BuzzFeed slogan is: Find Your New Favorite Thing! They use technology and human editors to find the hottest buzz on the web. Each weekday, they publish ten stories that highlighting the best stuff emerging from the Internet popularity contest. They use a combination of techniques to detect buzz, including a web crawler that checks over 50,000 sites daily, a trend detector that looks for accelerating buzz, a click tracker to measure reader response to stories, and a special terminal interface operated by BuzzFeed's human editors. You can use their widget or their badge.
Widget setup is quick and very intuitive. Result after two minutes (including registration)is on the top of the right sidebar.