[ Thanks to Lee Schlesinger for this link. ]
Modern web applications that make heavy use of Ajax
benefit from mashing up data from different services. Applications
built with the Google Web Toolkit (GWT) can work with both XML and
JSON data. In this two-part series, we’ll build a project to show
how to get and process XML and JSON data, and deal with sundry
matters such as security restrictions and server-side proxies. What
you’ll learn here should help you deal with all kinds of services
and enhance your GWT applications.