13. A computer system with a processor and a computer-readable storage memory the computer system comprising: means for presenting a graphical user interface at a client computer, the graphical user interface enabling a user to add a new annotation corresponding to media content; means for receiving a user request to add the new annotation; means for presenting, to the user via the graphical user interface, a plurality of likely temporal locations of the media content to associate the new annotation with; and means for receiving a user selection of one of the plurality of likely temporal locations to be the temporal location of the media content to associate the new annotation with.
13. A computer system with a processor and a computer-readable storage memory the computer system comprising: means for presenting a graphical user interface at a client computer, the graphical user interface enabling a user to add a new annotation corresponding to media content; means for receiving a user request to add the new annotation; means for presenting, to the user via the graphical user interface, a plurality of likely temporal locations of the media content to associate the new annotation with; and means for receiving a user selection of one of the plurality of likely temporal locations to be the temporal location of the media content to associate the new annotation with. 14. A system as recited in claim 13 , wherein the means for presenting the plurality of likely temporal locations comprises means for identifying a different one of the plurality of likely temporal locations to the user each time the user actuates a rewind button of the user interface.