You should take a look at Kaggle.com. There are lots of interesting problems, but what really was enlightening to me, was to look at the solved contests, and s

You should take a look at Kaggle.com. There are lots of interesting problems, but what really was enlightening to me, was to look at the solved contests, and see what the winning solution implemented. http://blog.kaggle.com/category/winners-interviews/ http://blog.kaggle.com/category/winners-interviews/