Now in 2012 I no longer have the opprotunity to visit my Brother-in-law, but I can tell you this much, over all of those years he never stopped loving trains, and expanding on his train set layout. I did have a couple of photo's of his latest layout (2010), and it's extensive. It runs throughout his home, basement, just everywhere. The best part from what I can see from the photo is that he designed the track network in such a way that it hugs very close to the upper most part of the wall (1 foot below the ceiling), and runs everywhere, even out to his shed via a wooden plexiglass bridge from his home to the garage...simply brilliant, and all I can say he didn't scrimp on the landscaping either.
The reason for this being so expansive is because my sister passed away back a few years ago which left him alone, so he poured everything he had into it (money, imagination, and loneliness), and voila, a train set to be proud of.
Now the reason why I posted this is because I came across a some pretty cool trains sims out there. The first is free, and the one I use. They are updating this simulation every so often, and believe me it's really cool. I personally love trains myself, and now live by a very active railroad (4 times per day, 2pm, 8pm, 2am, 4am...and so it goes) which by the way is just cool to watch, and if a diesel passes by hauling a heavy load, believe me the windows sometimes will rattle.

Note: Openbve is FREE, and donations are accepted of course.
#1 OpenBVE: http://www.openbve.org/
There use to be another called BVE4 but I can't seem to find a workable link. Maybe you folks will have better luck.
Some of us are familiar with Microsofts Train Simulator which is still going strong, but that isn't the one I am going to post here. Another is called Trainz, but I'm not going to post that one either...

#1: Railworks 3 Train Simulator 2012: http://store.steampowered.com/app/24010/
#2: World of Subways 3: Aerosoft Website
#2b: World of Subways 3: Forum Link
Special Note for World of Subways 3: Make sure you get the latest patch which is 1.3 which can be found at this link: 1.3 Patch
It's a must!
Here is a video of the World of Subways 3 Tutorial for those who wish to take this particular sim on.
http://www.youtube.com/watch?feature=pl ... v6ZkqU6-kw
http://www.youtube.com/watch?feature=pl ... RWr-yqO0ZY
Enjoy!