Background
I am creating an 'addressbook'-type application. There are a lot of entries to load. One idea was to initially load a small subset of the entries, to get the user started, then queue up the remaining entries, giving priority to the entries that the user clicks on. (e.g. if they click on the names that start with X, load those first before processing the rest of the queue). The idea is to load an initial dataset upon initialization (via AJAX) and then load the rest in the background (making a lot of AJAX calls).I am creating an 'addressbook'-typ