MVC 2 Client Side Model Validation with ExtJS

One of the most exciting new features in MVC 2 is "Enhanced Model Validation support across both server and client"; this new enhanced support allows for client side validation to be dynamically generated into a view from DataAnnotations attributes on models. One minor problem: Out of the box, it only uses the Microsoft AJAX libraries. Good news, we fixed that: Ext.ux.MvcFormValidator