Shoreman,
Brutal Knights are pretty great. The Feast of Shame and The Pleasure is all Thine LPs are both excellent but I wouldn't search too hard for the early 7"s unless you're a collector. I haven't heard the new full-length yet but the tracks I've listened to sound pretty good. I've seen them live a couple of times and they're a lot of fun - expect lots of rolling around on the floor and possible nudity. The songs are retarded in a good way and totally unpretentious.
Toronto has had a really good scene going on for the last few years:
The afore-mentioned
Brutal Knights
The much hyped
Fucked Up, who put out a series of awesome 7"s then I kind of lost interest in the later projects.
Career Suicide - Fast 80's hardcore done right.
Terminal State - More hardcore.
The Bayonettes - Great catchy girl-fronted punk.
And the list goes on. These are my personal favourites from Toronto though.