23. The local client set-top box as defined in claim 14 , wherein the signal output device notifies the viewer that content programming corresponding to viewer interests has been located by sending a notification message to a telephone number of the viewer, wherein the sending the notification message to the telephone number of the viewer includes placing a telephone call to the viewer.
23. The local client set-top box as defined in claim 14 , wherein the signal output device notifies the viewer that content programming corresponding to viewer interests has been located by sending a notification message to a telephone number of the viewer, wherein the sending the notification message to the telephone number of the viewer includes placing a telephone call to the viewer. 26. The local client set-top box as defined in claim 23 , wherein the signal output device outputs the notification to the viewer by displaying a notification message as a display line displayed in conjunction with programming that the viewer is viewing, wherein the display line specifies at least one channel currently having the content programming corresponding to the viewer interests.