GREAT MATHS SITES. Statistical and Applied Mathematical Sciences Institute (SAMSI) Statistical Visualization. For his book The Visual Miscellaneum, David McCandless, along with Lee Byron, had a look at breakups on Facebook, according to status updates.
They looked for the phrase "we broke up because" in status updates, and then graphed the frequencies over time. Why they couldn't just look at updates to relationship status, I'm not sure. AIMS: Adapting and Implementing Innovative Materials in Statistics. Many Eyes. Millennium Mathematics Project.