17. A single, interactive graphical user interface window to be presented on a display, the graphical user interface window comprising: a representation of a set of channels; and a representation of individual content items associated with each of the channels, wherein the individual content items include television programming and interactive data; wherein the single graphical user interface enables a user to select an individual content item associated with a displayed channel; wherein if the interactive data is selected, then the representation of the set of channels and the interactive data are both displayed within the single graphical user interface window; wherein the single graphical user interface window displays the representation of the individual content items associated with a channel upon selection of the channel by the user, wherein the single graphical user interface window does not involve overlaying; wherein the single graphical user interface window simultaneously displays categories, channels, and content, and permits navigation in the single graphical user interface therethrough, such that a plurality of sets of channels that each correspond to a plurality of categories respectively; and wherein upon selection of a single category of the plurality of categories by the user, the corresponding set of channels of the plurality of sets of channels is displayed.
17. A single, interactive graphical user interface window to be presented on a display, the graphical user interface window comprising: a representation of a set of channels; and a representation of individual content items associated with each of the channels, wherein the individual content items include television programming and interactive data; wherein the single graphical user interface enables a user to select an individual content item associated with a displayed channel; wherein if the interactive data is selected, then the representation of the set of channels and the interactive data are both displayed within the single graphical user interface window; wherein the single graphical user interface window displays the representation of the individual content items associated with a channel upon selection of the channel by the user, wherein the single graphical user interface window does not involve overlaying; wherein the single graphical user interface window simultaneously displays categories, channels, and content, and permits navigation in the single graphical user interface therethrough, such that a plurality of sets of channels that each correspond to a plurality of categories respectively; and wherein upon selection of a single category of the plurality of categories by the user, the corresponding set of channels of the plurality of sets of channels is displayed. 18. The graphical user interface window of claim 17 , further comprising an area for displaying the representation of the individual content items, and wherein the area occupies a substantial portion of the display.