A quick, dynamic way of representing data in websites, with an example of me playing around with the commands.
http://code.google.com/apis/chart/

While I am not necessarily interested in the Google's graphic displays, the idea of dynamically generating an image by passing in some structured data has possibilities. Using the url string as the delivery mechanism is also quite cool, because it means that a lay user could put complex information into a website without having to write code.