I don't think there's much to say about the R-D1. It just works. And when it doesn't, you do a forum search for Steve's Camera Repair.
If there were six million variations on the camera, a bunch of fakes, a Luftwaffe model, a Monte en Sarre model, a Swedish military model, a Luxus model, etc., then we'd need a forum in a big way.
I do like reading about how various lenses render on the R-D1, though, and this place is the place for that.