It seems that development of this software has come to a standstill.
This is unfortunate, because at the time of writing (Jan 2015), Reaper still does not support any of the CMC control surfaces.
I am very fond of the Steinberg CMC-TP (Transport Panel) and was hoping to use it in Reaper for quite some time now. Because other solutions did not show up, I have written a Midi translation file that allows use of the CMC-TP with Reaper.
"Bome's Midi Translator Pro" is required for this. For more information, see:
http://forum.cockos.com/showthread.php?t=153098
My solution is based on Reaper's AlphaTrack control surface integration. Steinberg's CMC-TP and Frontier's AlphaTrack are very similar with respect to operating elements and midi messages. This made it possible to connect CMC-TP and Reaper by means of Midi translation software.
Similar solutions should be possible for other CMC control surfaces, e.g. the CMC-CH or CMC-FD. Translation files for these control surfaces could make use of Reaper's MCU integration. I only own the CMC-TP, so I cannot experiment with these units. But maybe other users will look at my solution and create somthing similar for other CMC units.