Here’s a great example of an ExtJS interface to a real application.  While Ext is much better suited to RIA’s and admin screens than a full blown website frontend.  This is an admirable and polished attempt to build an interface to a well known tool using a powerful Javascript framework.  It’s also a great thing to disect and understand.

Find the Theme Here: http://extjswordpress.net/ 

Via   Weblog Tools Collection

• ExtJS 2.0 Released
• A Closer Look at the Blueprint .6 plugins