Ticket to ride

Well, Sharee and I have our plane tickets for Montréal, so I guess we're really going to do this. We'll be arriving late on Saturday the 1st, playing tourist in the city for the next few days, then checking in to the Delta Centre Ville on the 6th for the World Science Fiction Convention. I've wanted to go to Montréal for a long time, so this is pretty exciting. Anybody have any recommendations for what to see and do there? The Jardin Botanique is already on the list. It looks like the convention is being held right next door to the old part of the city, Vieux-Montréal.