The document announces a special session on Internet Based Services at the 2009 International Conference on Multimedia Information Networking and Security. The special session aims to provide a forum for researchers and practitioners to present original research on Internet based services. Topics of interest include Internet based services modeling, implementation, management, collaboration, security issues and solutions, and service-driven business process modeling. The deadline for full paper submissions is June 10, 2009. The organizer is Xi Chen from the School of Management at Nanjing University.