Everyone, I wanted to let everyone know that we just announced the first of two data challenges this year. The Wikipedia Participation Challenge is a data modeling competition where contestants are tasked with developing an algorithm that predicts future editing activity of editors on the English Wikipedia. More details may be found on the blog post: http://blog.wikimedia.org/2011/06/28/data-competition-announcing-the-wikipe… We’re very excited about this competition. The competition starts today and runs until September 20, 2011. More information on the competition may be found here: http://www.kaggle.com/c/wikichallenge (Kaggle is a company that hosts online data competitions. They are helping us manage this competition on a pro-bono basis). Just like Wikipedia, it’s open to anyone who wants to participate, so please spread the word! Howie