Charting /Data Visualization Libraries



I like to display interactive graphs on a web page using Rails
Can you please suggest javascript library which is well integrated
with Rails?
I found cool widgets from YUI or Google Visualization. Anybody has
experience using google visualization through Rails?



Open Flash Chart is well integrated with Rails thanks to the plugin made
by PullMonkey ( ) but as the name indicates
it, it is a flash library not a javascript one even if you can use js to
dynamically update the json data used by OFC. ( )