we have a sample application using JSFlot with RichFaces 3 (https://svn.jboss.org/repos/qa/people/ppitonak/richrates). It worked nice, however, you're right about unsuficient documentation.
I tried to port that application to RF 4 (https://github.com/qa/richrates), chart is diplayed correctly but it doesn't rerender.
JFreeChart is a also good and well documented, you can find a sample of doing this in this book :
Core Java Server Faces 3rd edition-> chapter 13-> HOW DO I->How do I produce binary data in a JSF page?
Thanks for your help! I've implemented charting with Jsfloat. However I'm facing an issue with displaying dates(using time mode) on my charts. Date actually gets shifted by one hour. Did you faced any troubles with that kind of charts?
Thanks in advance!
Date shift was caused by strange Jsfloat behavior - it shifts the date to UTC 0.