I was looking around the forums this morning and noticed something neat. I saw this thread by RichBohlman, and thought this would be a great example of the potential for crossover between the card modelers and model railroaders. In that thread, and some of his other threads which I'll list below, I think there's a lot of inspiration for anyone building a layout to consider card models.
A few of his other threads:
http://forum.zealot.com/t150567/
http://forum.zealot.com/t149848/
http://forum.zealot.com/t150372/
A few of his other threads:
http://forum.zealot.com/t150567/
http://forum.zealot.com/t149848/
http://forum.zealot.com/t150372/