Brandt Road Rail Corporation

This company makes some very nice rail-going trucks. I've seen one in action in the Amherst area and I believe it's used for local (Moncton, Sackville, Amherst) switching duties instead of a dedicated locomotive.

http://roadrail.brandt.ca

Fox Valley Models

Here's a new site that someone recently brought to my attention:

www.foxvalleymodels.com

Looks like they have some nice N scale structures and rolling stock available. I'm especially interested in the "Milk House". :)