Topics include:

• Scalability, the ability to handle at least thousands of concurrent users, interacting via Internet.
• Interactivity, how to provide responsive, near real time interactions despite latency and jitter.
• Consistency, providing consistent views for users, despite the inherent delay in state updates.
• Persistence, the ability to save and access the world states despite disconnections and failures.
• Security and privacy, distributed algorithms that allow secure interactions and privacy guarantees.
• Interoperability, integration of multiple systems or providers with common protocols or clients.
• Bandwidth restricted (mobile) devices, the integration of mobile devices for nomadic systems.
• Self-organizing architectures, load balancing and fault tolerance without manual configurations.
• Content streaming, voice communication and 3D content streaming, incremental deployment and updating.
• Implementation issues, novel approaches to address development challenges.