We infer a great deal of information from the people around us, yet this 'crowd wisdom' is absent on the internet. When we visit a webpage, we don't know how many people are visiting with us, where they came from, or where they're going. My friends,
Chris,
Bryan, and I aimed to solve this by augmenting the scrollbar with a small visualization showing the scroll position of others who are currently visiting the same page as you. We won best hack at the Yahoo Hack Day event in 2008 at Carnegie Mellon for our creation, as well as winning "Best User Interface" at the Yahoo Open Hack! event in 2009.