The virtual messenger system acts as a portal to subtly communicate messages and pass information between the digital, virtual, and physical worlds, using the Media Lab�s Glass Infrastructure system. Users who opt into the system are tracked throughout the Media Lab by a multimodal sensor network. If a participating user approaches any of the Lab�s Glass Infrastructure displays they are met by their virtual personal assistant (VPA), who exists in DoppelLab�s virtual representation of the current physical space. Each VPA acts as a mediator to pass on any messages or important information from the digital world to the user in the physical world. Participating users can interact with their VPA through a small subset of hand gestures, allowing the user to read any pending messages or notices, or inform their virtual avatar not to bother them until later.