Recently more and more researchers are realizing both the challenges and the opportunities for multimedia research brought by the Internet. In order to bring together high-quality and novel research works on Internet Multimedia Mining, Xian-Sheng Hua, Zhi-Hua Zhou, and myself are organizing a workshop on the topic at the forthcoming IEEE International Conference on Data Mining. One of the major obstacles of Internet Multimedia Mining research is the difficulty in forming a good dataset for algorithm developing, system prototyping and performance evaluation. Together with this workshop, we release a benchmark dataset, which is based on real Internet multimedia data and real Internet multimedia search engines (check the website for details). Submissions to this workshop are encouraged to use this dataset, but papers/demos working on other Internet-based datasets are also welcome. The deadline for submitting a maximum of 10 pages in the IEEE 2-column format is August 8.