Jeffery Chiang recently submitted an excellent visual representation of the jQuery library, to the jQuery mailing list. It shows all the different plugins and what methods/features they support (borrowed from the jQuery Documentation). Similar diagrams have been done for the Prototype library – but none of them have the cool Devo hat of jQuery to go along with it. If anyone is feeling adventurous, using the styles of this map would make for an awesome redesign of the documentation page.
John Resig