From a company with not exactly the same privacy standards or data mining needs as Wikimedia, but still an interesting read:
http://www.technologyreview.com/featured-story/428150/what-facebook-knows/

Begin forwarded message:

Date: June 14, 2012 11:05:22 AM PDT
Subject: Profile of Facebook Data Science Team
Source: FlowingData
Author: Nathan Yau

MIT Technology Review profiles the Facebook Data Science Team, described as a gathering of grad students at a top school and headed by Cameron Marlow, the "young professor."

Back at Facebook, Marlow isn't the one who makes decisions about what the company charges for, even if his work will shape them. Whatever happens, he says, the primary goal of his team is to support the well-being of the people who provide Facebook with their data, using it to make the service smarter. Along the way, he says, he and his colleagues will advance humanity's understanding of itself. That echoes Zuckerberg's often doubted but seemingly genuine belief that Facebook's job is to improve how the world communicates. Just don't ask yet exactly what that will entail. "It's hard to predict where we'll go, because we're at the very early stages of this science," says ­Marlow. "The number of potential things that we could ask of Facebook's data is enormous."

Related

Read more…