Yesterday Jack and his team have released Ext v1.1.
The 1.1 version includes the new stand-alone version of Ext, a lightweight HTML editor, a new Ext.Ajax utility class, enhancements to DateField and DatePicker, expanded documentation and bug fixes.
Ext doesn’t depend on 3rd party libraries anymore.
An important step in Ext’s evolution as it’s no longer a requirement that you use a 3rd-party base library when developing an application with Ext. The Ext framework will continue to include adapters for other popular libraries to allow you, the developer, to choose the most appropriate library for your project.
Ext now features it’s own lightweight WYSIWYG Editor.

At first it looks to work really well and fast, but if you take a look at the source output you’ll notice it’s not xHTML valid. Hopefully this will be improved in later releases.
As usual you can download it directly or build your own custom package.