Google has introduced for developers a new way to try their ajax api's here : Google AJAX API Playground.
The Google AJAX API Playground is built on Google App Engine, and the code is open-sourced under an Apache 2.0 license
Presenters -- Web Guild
Incorporated AJAX is enabling the creation of applications with better functionality, usability, and an overall better user experience. This panel will discuss how desktop-like applications can be delivered via the browser with Ajax, the efficiency of developing such applications, and the importance of the GUI. They will also share their thoughts on highly successful applications and the shortcomings of using Ajax.