Building a Tag-Cloud Using the Google Web Toolkit - Nettuts+
http://net.tutsplus.com/tutorials/javascript-ajax/building-a-tag-cloud-using-the-google-web-toolkit/

A while back, I read a tutorial by Dan Wellman, which described the steps required to produce a neat Tag-Cloud. Dan's example largely relied on the jQuery framework to request data and construct the user interface elements. I decided to write his tutorial all over again with the two exceptions of using GWT instead of jQuery, and a different method of choosing font size variations. In case you don't know what Tag-Clouds are and what purpose they serve, briefly, a Tag-Cloud is a form of visualizing the difference in importance or activeness of some predefined categories based on how large they appear in the cloud. Tag Cloud We are going to use the latest version of GWT (currently 1.5) and work with MySQL and PHP as our back-end to request the JSON data. Similar to Dan's tutorial, I too, assume that you already are familiar with inserting into a database. The PHP code in this article will merely cover how to query data from the database and send back the result in JSON format. You shoul

http://net.tutsplus.com/tutorials/javascript-ajax/building-a-tag-cloud-using-the-google-web-toolkit/