Droop-Nizzle has posted some well-organized thoughts on web frameworks in general, and the need (or lack thereof) for a framework in Flex.

I mostly agree with his summary. It would be nice to have better test support in Flex (although I like mostly FlexUnit from what I have seen so far), and common app structure is always a good thing.

However, the Ajax.request example is a bit of a moot point. Ajax is just an object somebody put in a JavaScript library, and ActionScript's prototypes are just like JavaScript's, so doing the same style of syntax in ActionScript is a trivial matter. Class and usage sample below.

new RemoteCall("untitled.txt",
   function():void {
      mx.controls.Alert.show("Yeah It Worked: " + arguments[0].result);
   },
   function():void {
      mx.controls.Alert.show("boo I didn't work: " + arguments[0].fault.faultString);
   }
);

package remoting
{
   import mx.rpc.http.HTTPService;
   import mx.rpc.events.ResultEvent;
   import mx.rpc.events.FaultEvent;

   public class RemoteCall
   {
      private var _service:HTTPService;
   
      public function RemoteCall(url:String, result:Function, fault:Function)
      {
         _service = new HTTPService();
         _service.url = url;
         _service.addEventListener(ResultEvent.RESULT, result);
         _service.addEventListener(FaultEvent.FAULT, fault);
         _service.send();
      }
   }
}