Hi rfletcher, I currently don't have access to a working NCM install but I think all of the Orion apps write to log files. Here is the location of the APM files which I would guess would be the same root folder location(s) as the NCM log files.
http://knowledgebase.solarwinds.com/kb/questions/2280/Where+are+the+Orion+APM+log+files+located%3F
Hope that helps!