Cool....Great yet Simple..
Embed charts in webpages with one of our simplest APIs yet
We actually built this originally to use internally - we use it on Google Video and Google Finance for example. It seemed like it would be a good thing to open up to other users too. You can find out all about it at on the Google Chart API homepage and there's a Google Chart API group for questions and support.
Google publishes chart API for web pages
A single HTTP GET request with parameters is all you need. You can even use the URL as the src attribute on an img tag.
Also Read:Programmable Web: Google’s New Chart API