Google Web Toolkit allows programmers to use Java programming language instead of JavaScript(!) to create all those “fancy” looking AJAX based interfaces. Its pretty cool though. I thought, to learn GWT and get any good at it, I need to learn JavaScript, which I totally hate. Instead, you write your programs in Java and then just run it through the google’s compiler which generates all the required HTML and JavaScript code.
Which is a YAY! IMHO. I love Java.