Hi Andrew, no, not at the present time. We have received some requests. However, at this point we're inclined to leave support for additional targets to more sophisticated (third party) profile-building software tools.
I would not describe the DNG Profile Editor as being unsophisticated. If DNG adopted other forms of reference it would make it a more valuable tool. A good example is what Rags Gardener did with ACR Calibration Scripts.