Update: The Due VGA Library now has a github page 
http://stimmer.github.com/DueVGA/
I have written some instructions on how to wire up the circuit on a breadboard:
http://stimmer.github.com/DueVGA/breadboard.html
No code updates yet but the next release will have a big improvement in the speed of the colour modes, as I have now worked out how to do them using DMA 
JLS1: May I include your Rossler code as an example in the next release of the library?