One client just bought a 24in Barco reference monitor and a 55in plasma monitor for the Mistika grading suite. It looks like LightSpace CMS could communicate with them for calibration but I can't find confirmation on that. Any lead?

LightSpace CMS can 'calibrate' ANY display - projector or monitor.

Where you use the calibration LUTs is really the question.

Some displays allow LUTs to be loaded into them - such as those from FSI - others don't.

The alternative is to use LUT boxes in the signal path directly before the display.
You would need one LUT box per display.

See: http://www.lightillusion.com/aja_lut_box.html
And: http://www.lightillusion.com/is-mini.html
And: http://www.lightillusion.com/eecolor.html

Steve