Google has released via its Google Code project an implementation of XSLT in javascript... Quite interesting to improve the development of AJaX based applications, I think this is the only reason to put the term AJaX in the project... But it is true that everytime you put AJaX in a title of something you are getting people interested...
The source code is available in sourceforge.
Feel free to post comments into the Google group created for this
Back in consulting I did some small projects using the Pushlets framework. A nice and simple solution to create easily Web eventing applications...
The Pushlet team has created a small demonstration of integration of Pushlet and XMLHttpRequest together...
If you never used Pushlets, take a look to it it is really nice!
I am sure you already heard about AJAX, the "new" way of building Web application where using HTML, Javascript, DOM, and XML you can build very interactive Web applications, some examples of this interactivity are Google (suggest, local, mail), MSN, Amazon, .....
If the term Ajax is relatively new, the technologies used are quite old now. And you do not need anything new to be able to leverage this approach in your current development, and since it is mainly a client (browser) based technology this can be used whether you develop your application in Java, PHP, or or even PL/SQL for the Web. In the same time, you do not want to have to develop too much of the client side to handle user interaction, this is where new frameworks that provide support of this technologies, let's say AJAX based, are very interesting. It is now possible to create very interactive Web application without passing 80% of your time in the client side development - that could be generated from your server obviously.
In the same time, before adopting such framework, it is important to understand what is happening. This is why I am creating this quick introduction based on 2 simple use cases: