- I've found there used to be a project here http://www.google.com/search?hl=en&q=http%3A%2F%2Fdrupal.org%2Fproject%2Fchartapi&btnG=Google+Search but it is now disappeared or aliased elsewhere.

- I've found there is a module started here http://drupal.org/project/chart

- It sounds like there are already two modules according to http://drupal.org/node/200816 and its references (there's a module on that code.google.com thread)

Is there anything else underway or already committed?  I also think I saw somewhere the idea of a Google chart views plugin.  

Thanks for any more information.