Works for me as well. GraphicsEnabler=no, but otherwise no editing of kexts or other hackery. Some have had issues with flash video that were fixed by editing AGPM, but I havent encountered that.
Currently running two HDMI monitors on my EVGA 650, 1 directly and 1 through a DVI adapter. Word of caution though, dont use VGA through a DVI adapter. Every time I tried doing that, the machine would instantly freeze.