Kaggle

Kaggle.com is making data science a sport. This fascinating new startup is already changing the world, running contests that help companies, governments and researchers crack their toughest problems. NASA uses them.
http://www.kaggle.com

Great interview with the co-founders of Kaggle.
http://techzinglive.com/page/927/166-tz-interview-anhony-goldbloom-and-jeremy-howard-kaggle