I recently stumbled on scriptsrc.net while looking for the latest and updated version of mootools hosted library.
Tired of hunting down the script tag for the latest version of your Javascript Library of choice?
Yeah i was too, so this page was built this for you. head over and Bookmark it.
it has the most current library script with just a click to copy such as jQuery, jQueryUI, Chrome Frame, Mootools, Ext Js, Prototype, Dojo e.t.c.