I'm not sure if most people are aware of this, but I've been playing with Reaper, and I didn't see a way to import OMF, but I did see that a Samplitude.EDL file is one of the supported project files. So I exported the file as OMF from Sonar, imported into Samplitude, and saved as a .EDL file. I open project in Reaper, and clicked on the .EDL file and it opened perfectly in Reaper. Keep in mind, saving as a .EDL file requires that all of the tracks are wave files. 

If your intention is open Sonar projects in Reaper, you can do this directly... Far from complete at the moment, but definitively more then OMF/EDL (MIDI, FXes, Synth, routing, automations, etc).

Yes, thank you, I've been following your thread very closely. I've just begun to muck around with Reaper. I've been using Samplitude as my main DAW, but I'm looking forward to trying your software conversion.