Reposting from the "are all PC monitors garbage? thread. Note that further to my post in this thread, although things are muched improved via DVI (attached via the HDMI-DVI adapter provided with the Mini) -- the signal is now RGB instead of YUV -- the display range is still 16-235 rather than 0-255.
Well, after fighting with the current monitor I'm using via an HDMI connection, a DVI cable provided instant results as well as pleasing results after calibration.
Not sure about color accuracy right now, but the image is night-and-day better than it was using HDMI -- I spent most of my evening last night trying to tweak it through OSX's calibration wizard. Took two shots today to get it where I wanted (two because I realized I needed to reset brightness and contrast on the monitor).