Dave,
If you get it, check out the RFD channel. They have some occasional train shows and also the I Love Toy Trains series from TM books. They also have some other interesting shows on old farm machinery and stuff like that, if you like that kind of thing. We had it with Time Warner, but when we switched to Google they don't offer the RFD channel. They are a LOT less on the old monthly bill though!
Now back to the regular scheduled programming of layout planning. Sorry to interrupt Mark, but they do have some good train shows.