Pointers to creating virtual monitor drivers for OS X

Question

I\'d like to create a virtual monitor driver for OS X. What I mean by virtual is a monitor driver that does not drive an attached monitor, yet fools OS X into thinking there is

Answer 1

After days and days of attempts, I found http://code.google.com/p/ioproxyvideofamily/ which works like a charm. Tried EWProxyFramebuffer, tried iDisplay, but this is the first one that actually works!

- Update -
Sounds like ioproxyvideofamily hasn't been kept up to date with new OS's. I haven't tried it (or any alternatives) since 10.7. If you find a better alternative, create a new answer to this question.