Ajaxian had a story yesterday about a brand-new JavaScript playground called jsFiddle. A write and execute web-based JavaScript IDE is nothing new, but this is much, much more than that. The real power of jsFiddle is that you have the option to include any of the most popular JS libraries, including; Mootools, jQuery, Prototype, YUI2.8, YUI3, Glow, Vanilla, Dojo, Processing.js, & ExtJS. This featu