LinkedIn's New Profile: Insights
When you view a connection's profile page, you'll also see insights about his or her network and how you're connected.
Like the circle graph on your profile, you can drill down into your connection's—or prospective connection's—graph in the same manner. The other graph shows what you have in common, whether it's a school, skills and expertise, or groups.
If you're not connected to a person, you'll also see an image with insights into which connections you may have in common.