Techniques are provided for delivering content to mobile communication devices related to interactions of members with a user community. The method involves detecting a communication session involving a mobile communication device; determining one or more context parameters associated with the communication session; and delivering content related to the context parameters to one or more mobile communication devices. Data is stored at a central computing entity that indicates association or membership of a plurality of mobile communication device users in a user community. The central computing entity detects when an action is taken by one mobile device user that is a member of the user community, and sends a notification to members of the social circle based on the detected action. These techniques allow individuals who are involved in a user community to maintain their interaction with the user community using their mobile communication devices.