1. A method for delivering information to a subscriber involved in a certain active telephony session, wherein the subscriber is a member of a certain subscriber group, said method comprising: a) receiving a message originating from a sender and directed to the subscriber, wherein the message is associated to sender identification data and includes content, the content of the message including at least one of a recorded voice message, a text message and a recorded video message; b) processing the sender identification data to determine whether the sender is a member of the certain subscriber group; c) determining whether the sender is permitted to interrupt the subscriber during an active telephony session at least in part based on whether the sender is a member of the certain subscriber group; d) when it is determined that the sender is permitted to interrupt the subscriber during an active telephony session, interrupting the certain active telephony session at least in part by causing information conveying at least a portion of the content of the message to be delivered to the subscriber during the certain active telephony session.