It would be nice if we could use some other technology to render charts. It would also be nice if that technology was not GPL licensed. Sonatype/Oracle's Hudson has made the necessary refactorings to make this a reality - let's take their MIT changes and incorporate them.

Useful links:

https://github.com/hudson/hudson/commit/7d0f7f9126a4be90e4ba1380c2f400407119888e
https://github.com/hudson/hudson/commit/7a5feb1c787c3651488fdcbc9671e785e3dd29bb
https://github.com/hudson-plugins/jfreechart-plugin