GWT Designer, ScriptSharp, Ext JS

Some AJAX things I've been eyeing. Microsoft AJAX just isn't good for certain things, although it's nice.

• GWT, of course. Now 1.6 is in beta.
  
• GWT Designer -- $99 purchase, or $59/year.
  
• Script# - a .NET answer to GWT. Not many widgets, but works with Ext JS (!) via the extsharp project. Was on Codeplex, but removed. Speculation is that MS will integrate it into Visual Studio at some point. Here's a good video/powerpoint presentation on getting started. Helps to navigate your way around the bugs.