Re: Visiting Toronto, any (arty) advice?
Art Gallery of Ontario, then south through the Ontario College of Art, walk through the park south of that (sidestreet), see the Grange (turn your head west), see the Art Gallery from the backside (super cool architectural happenings, then south again to Queenstreet west where there is the most amazing graffiti in the back and side alleys, beautiful stuff (mixed in with the banal, of course). Kensington Market, West of Spadina, North of Dundas has great little shops and more fabulous graffiti.
Distillery District (a small bundle of buildings) is another place. It has one building that is all artist run small galleries. I can get you address if you need them, but I think there is enough info to just google it.