Twitter.com is a website where people post what they are doing, when they are doing it. It is like a 1 sentence blog entry, where you succinctly say what you are currently doing. You post an update to your situation whenever you can. The public and your friends can see what you are doing and receive updates to this via RSS feeds, your phone via SMS (text messages), and your IM client. You can even embed a Twitter badge on your website to show the world what you are currently doing.
They’ve made it really easy for Flash developers by providing public XML and JSON feeds for both the general public, and your friends specifically. This example reads in the public feed via PHP proxy so you don’t need to login or anything. It also shows how easy it is to work with JSON compared to XML when compared to the Amazon example.
Twitter Example – Source ZIP