1. A computerized chat system comprising: a central chat server maintaining a plurality of program-specific chat rooms; at least one tuner, each tuner capable of switching among a plurality of channels, each channel receptive to a plurality of programs; at least one computer, each computer having a program guide including an identification code for each program of each channel of a corresponding tuner, wherein each computer detects the channel switched to on the corresponding tuner and sends the code of the program currently on the channel to the Server, the server linking the computer to the chat room for the program corresponding to the code, automatically without any user intervention.