Hi jxp,
I was impressed with your plugin, 'cause I have been looking for a program that can save files with a color palette with fewer colors, and of course, free of charge. The paint program that comes with the Windows is not useful for me, whereas Paint.net is far more confortable.
And I'm now wondering your plugin could allow me to save files with binary GIF format, that is, a GIF format with black and white only. If it is possible, would you please let me know?