The UI JavaScript library, Ext JS, has revealed their milestone 2.0 release, together with revised API documentation and a clean new design for their website. From its humble beginnings as a set of UI components built on top of Yahoo!‘s code, Ext has grown into a powerhouse of a library, with comprehensive documentation, a large user community, and (since v1.1) a native adapter on top of the original YUI/Prototype/jQuery flavors. If you haven’t already, check it out.