Google released a chart generator service they are calling the Google Chart API. Usage is quite straightforward: you link to an image in the form of a parameterized URL, e.g. (line break added)
http://chart.apis.google.com/chart?cht=p3&chd=t:90,49&chs=350x150&chl=Foo|Bar
... and Google returns a PNG graphic containing the chart. For instance, above URL results in the following image:
Here are a couple of more examples of what can be done with the Chart API (cached again, but click them to see a live parametrized version):
Also see how you can kidnap Google Page Creator's image generator.
read more: Google Code blog
