A system and method for creating and managing custom media channels within an Interactive Digital Program Guide (IDPG) of a device having a set-top box function associated with a cable or satellite television network. In general, a user interacts with the set-top box function to define a custom media channel. The custom media channel may be defined by a channel name and user preferences. Once the custom media channel is defined, an Internet search is performed based on the user preferences in order to identify media presentations for the custom media channel. Thereafter, when a user selects the custom media channel via the IDPG, the media presentations are played in a substantially continuous stream in either a predetermined or random sequence.