24. A computer readable storage medium storing one or more programs for execution by one or more processors of a client computer, the one or more programs including: a client assistant configured to monitor a user's browsing activities within a currently displayed document having links to one or more associated documents, including monitoring proximity of a user-controllable pointer to one or more of the links in the currently displayed document; the client assistant including instructions for identifying a link satisfying predefined criteria, the predefined criteria including proximity criteria with respect to the user-controllable pointer; and a communications interface coupled to the client assistant for transmitting to a server, prior to user selection of any respective link, a request for a document corresponding to the identified link.
24. A computer readable storage medium storing one or more programs for execution by one or more processors of a client computer, the one or more programs including: a client assistant configured to monitor a user's browsing activities within a currently displayed document having links to one or more associated documents, including monitoring proximity of a user-controllable pointer to one or more of the links in the currently displayed document; the client assistant including instructions for identifying a link satisfying predefined criteria, the predefined criteria including proximity criteria with respect to the user-controllable pointer; and a communications interface coupled to the client assistant for transmitting to a server, prior to user selection of any respective link, a request for a document corresponding to the identified link. 33. The computer readable storage medium of claim 24 , wherein the client assistant includes instructions for sampling two or more pointer locations and fitting a curve to the two or more pointer locations; and the predefined criteria includes determining proximity of the curve to a position of one or more links in the currently displayed document.