ExtJS 2.1  released with following features:

• Full REST support
• Added Ext.StatusBar Component and Samples
• Added Ext.Slider Component and Samples
• Added Example to demonstrate Remote Loading of Component Configs
• Added Grid Filtering Sample
• Added Layout Browser Sample
• Added Spotlight Sample

Also ExtJS team published preview  version of ExtJS 3.0

Source: ExtJS.

Nice control were created by Ext Core Team member Jozef Sakalos.

Source:Ext team blogs

Jack Slocum writes about Windows Vista gadgets created with ExtJS 2.0 in his blog He writes

«A while back in the Ext forums I mentioned a Forum Gadget I was working on for Windows Vista created with Ext 2.0. The gadget gives the ability to monitor the Ext JS forums (all posts or by individual forum), perform fast searches and supports both docked and undocked mode.»

This is a maintenance release that fixes several issues with the 2.0 release. Some notable issues that have been addressed include:

• Fixed various overflow/scroll issues related to form fields and grid
• Workaround included for the Firefox 2.0/Mac overflow:auto invisible scrollbar bug
• Fixed several issues related to destroying form elements
• Multiple GridView and GroupingView fixes
• Various other minor bug fixes and documentation updates

ExtJS is a very powerful library. TH ExtJS team continuing to produce a lots of plugins for it. Few days ago the Grid Filter Plugin was released.
One of the plugin creators explaining in his blog for what this plugin designed:

The Ext Team has been hard at work creating documentation for the 2.0 release. We now have several documents for new and existing Ext users that should come in very handy during the transition to 2.0.

Ext 1.1 is now official. The beta period is over, and anyone on older 1.x versions of Ext should strongly consider upgrading to 1.1 as it is the most stable and bug-free release yet. Please visit download page now and get a copy for yourself!

The 1.1 Beta 1 download is now available. This build includes Ext Stand-alone, a lightweight HTML editor, Ext.Ajax utility class, DateField enhancements, more documentation and many bug fixes.

Ext Stand-alone
Ext can now run on its own without a base library. The ext-base file weighs in at 34kb minimized. This is less than YUI utilities + adapter (58kb), Prototype/Scriptaculous + adapter (71kb) or jQuery + required plugins + adapter (62kb - minimized, not packed).