Chalk up Kingston, Ontario as the next possible medium sized Canadian market with a silent AM band. Both remaining AM stations CFFX 960 and CKLC 1380 have applied to flip to FM:
http://www.crtc.gc.ca/archive/ENG/Hearings...7/n2007-6.htm#4
http://www.crtc.gc.ca/archive/ENG/Hearings...7/n2007-6.htm#6
To add a bit of spice to the situation Kingston's K-ROCK (CIKR 105.7) has applied for a new Country FM in the city as well:
http://www.crtc.gc.ca/archive/ENG/Hearings...7/n2007-6.htm#5
All 3 applications involve utilizing different FM frequencies, so it's quite conceivable that they could all be approved.