A media appliance comprising: video apparatus for outputting signals to a screen; a control device allowing a user to control the output of signals from the video apparatus to the screen, thereby selecting a viewing activity; a network interface for accessing a packet-based network; a memory storing a communication client application; and processing apparatus, coupled to the memory, network interface and video apparatus, and arranged to execute the communication client application; wherein the client application is configured so as when executed to allow the user to conduct bidirectional communications with other users via the packet-based network, and output notifications to the user of incoming communication events received from other users over the packet-based network; and wherein the client application is further configured to defer one or more of said notifications of incoming communication events received during said viewing activity, determine a delineation in the viewing activity, and automatically output the one or more notifications to the user following said delineation.