Explorations is published twice yearly, in June/July and in December/January each year. The newsletter is distributed in hardcopy form to all members of the ACM SIGKDD. It is also sent to ACM's network of libraries. Online versions are available on the web free to the general public. Our goal is to make the SIGKDD Newsletter an informative, rapid means of publication and dynamic forum for communication with the Knowledge Discovery and Data Mining community. SIGKDD membership is growing at a very fast pace, and with KDD being a multi-disciplinary field, we hope Explorations will facilitate its fusion and enhance the sense of community.