Comet Ajax Development
Doing some recent research within the area of AJAX led me to a spin-off of the Ajax era of web application development called Comet. Using Comet, developers have the ability to stream data to and from the browser, instead of communication done thru series of call backs between the browser and the server. Seems like a slick idea, but if you have not used JSON before (basically a Java based XML language) you are in for a slight learning curve. Lingr.com is a great example of an easy use of Comet in the development of a web based chat room website, and is really quite slick. Meebo.com is also another good example. A good starting tutorial is also available here.