Another useful tool from MIT Media Lab (remember, the first one was OECD): Immersion analyses your emails and helps you understand who you mostly correspond with. It uses the From, To, Cc and Timestamp fields of the emails and show your email network.
So what is Immersion really?
“Immersion is not about one thing. It’s about four. It’s about self-reflection, art, privacy and strategy. It’s about providing users with a number of different perspectives by leveraging on the fact that the web, and emails, are now an important part of our past”.