Abstract: Stationary or portable devices that include a first user interface member residing on a front portion of a housing configured to electronically navigate data on a display; and a second user interface member residing on a back portion of the housing configured to electronically navigate data on the display.

Abstract: A communication terminal includes a communication module and a controller. The communication module is configured to communicate with other communication terminals over a interface. The controller is configured to establish a connection with a participant communication terminal via the communication module, to maintain a play list representing multimedia files to be played, to receive a participant multimedia file identification from the participant communication terminal, wherein the participant multimedia file identification corresponds to a participant multimedia file stored on the participant communication terminal, to add the participant multimedia file identification to the play list, to automatically prioritize the play list according to at least one criteria, and to thereafter execute playback of the multimedia files represented by the play list, including retrieving the participant multimedia file from the participant communication terminal for playback.