Abstract: Methods and apparatus for implementing multi-user casual interactions between users, a plurality of shared display devices, and/or a plurality of third-party devices. The methods include the ability for any user, without any registration prerequisite, to enter content on a handset and to cause certain content changes to be displayed on certain shared display devices, as well as related content information to be sent back to the requesting user's handset and optionally to other users' handsets or to certain third-party devices. The methods also include the ability for an operator to use a graphical user interface to create and manage the rules that control such behavior depending, among other parameters, on the user's submissions or on other users' submissions over a period of time. The methods enable the rules to be extended in an unlimited fashion thanks to the ability to interconnect with a plurality of third-party services.