Dojo 1.4 is out with Significant Improvements to Performance, Stability, and Features

Key updates mentioned are:

• IO Pipeline topics
• dojo.cache
• dojo.contentHandlers
• dojo.hash with native HTML5 onhashchange event support where available
• Traversal and manipulation for NodeLists (the return value for dojo.query)
• dojo.ready (easier to type than dojo.addOnLoad)
• Hundreds of refinements to the Dijit API and collection of Dijits, and a few new widgets in DojoX
• DataChart widget and other improvements to charting
• dojox.drawing lands!
• Editor improvements and new plug-ins in both Dijit and DojoX
• Grid is faster, and the EnhancedGrid lands!
• ForestStoreModel for the TreeGrid
• GFX improvements
• dojox.jq, a very experimental module aimed at trying to match the jQuery API as close as possible, but using Dojo underneath
• Dojo build system optionally supports the Google Closure Tools compiler
• Significant speed improvements, especially in IE

http://docs.dojocampus.org/releasenotes/1.4