How can I invert colors on ONE screen in Mac OS X?

I know that trick with Command-Option-Control-8, but is it possible to invert colors only for one monitor? It's extremely great to program with these colors.. but I need one normal monitor also for preview =(

Michel Fortin's Black Light does it.

With Black Light you can apply a combination of visual effects to your screen by manipulating the gamma curve. Opening Black Light will automatically apply the selected effects. Quiting the application will restore the original settings. Clicking on the Black Light icon in the dock will activate and deactivate the selected effect combination.

I even donated to him =]

There's also an interesting hardware "solution" that works.

I have a Diamond BVU195 USB display adapter to connect additional monitors. It uses the DisplayLink technology. When reversing colors, monitors connected through the USB adapter do not reverse. I'm assuming it's a to do w/ the DisplayLink drivers, so any adapter that uses DisplayLink would probably do the same.