Posted a bunch of stuff I came across to the WaterlUX group page, figure I might as well document them here too:
ricostacruz.com/jquery.transit/ (Lovely lovely annotated source at ricostacruz.com/jquery.transit/source/)
daneden.me/animate/ – Memories of Overused Powerpoint animations spring to mind… But I can see using the attention getters & fadeIn/Outs on a webpage.
Also, ninjaui.com/ for icons without retrieving icon/font files (ie. all in JS)