Just a heads up, it appears Calgary does officially have Trusted Traveler lines on the domestic side.
http://www.catsa.gc.ca/trusted-travellers
As another heads up to people who don't already have it: it isn't worth it, don't bother signing up, the regular line isn't
that long anyway, do you really want the government to have your fingerprints, retinal scans, DNA, underwear size....
If every idiot occasional flyer gets NEXUS then the advantage it grants NEXUS holders will be diminished.