There is the absolutely grungiest looking SP yard switcher here in the Council Bluffs yards. I will have to try to remember to take my camera along when I know I am going to be down in that part of town.
Also, up in the other end of the area I see from time to time an old GTW blue engine. I'm not sure if it stays around all the time or just comes into town on a freight from the east.
Actually lots of good stuff to see here. One of the slickest ones I have seen recently was an entire train of KCS all painted in their new scheme, engines and grain hoppers. Pretty impressive. They come this far north on the BNSF line from Kansas City to service one of the large grain elevators here.