I finally had a chance to visit Nashville early this month, on the way home to South Carolina at the end of a road trip out west. I added two clicks to the ridership count for June (Lebanon to Riverfront and back in the morning), and got a few pictures:
http://web.presby.edu/~jtbell/transit/Nashville/
I missed some photo-ops while driving around because of my ineptness in chasing "real trains" instead of streetcars or light rail, and my unfamiliarity with the territory. Next time I come, I'll do better.
Back in this thread a ways, there were a couple of posts wondering about transit-oriented development along the line. I suspect that may be in Mt. Juliet. There's a vacant plot between the station and route 171 which crosses the line nearby, that seemed to show signs of imminent construction of some kind. And there's already commercial activity along 171 which would provide something to walk to. Mt. Juliet would have been a nice place for a photo, with the shops next to the tracks, but the timing just didn't work out for me.