3. A computer system having a processor and a computer-readable storage memory, the computer system comprising: means for presenting a user interface at a client computer, the 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 analyzing at least a portion of the media content to identify a likely temporal location of the media content to associate the new annotation with; and means for presenting the likely temporal location to the user via the user interface.
3. A computer system having a processor and a computer-readable storage memory, the computer system comprising: means for presenting a user interface at a client computer, the 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 analyzing at least a portion of the media content to identify a likely temporal location of the media content to associate the new annotation with; and means for presenting the likely temporal location to the user via the user interface. 9. A system as recited in claim 3 , wherein the means for presenting comprises means for displaying a presentation time of the media content that corresponds to the likely temporal location.