The 15th ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD 2009) will be held June 28 to July 1 in Paris, France. Yahoo! has earned 12 out of 142 total accepted papers this year and the Best Paper Award for "Collaborative Filtering with Temporal Dynamics" by Yehuda Koren. The annual ACM SIGKDD conference is the premier international forum for data mining researchers and practitione